Anterior view. below it, to the teres minor muscle. Structure of an adult human long bone. Humerus. The labels include periosteum, compact bone, nutrient artery & vein, medullary cavity, yellow bone marrow, endosteum, epiphyseal line, and spongy bone with red bone marrow. Human anatomy. Skeleton anatomy scheme with greater tubercle, deltoid tuberosity, medial epicondyle, trochlea and other parts. Both these tubercles are found in the proximal part of the shaft. A problem with which of the following would most likely contribute to this condition? Humerus - inferior epiphysis. It is located between the elbow joint and the shoulder. This results in separation of one or both of the condyles from the shaft of the humerus. Left elbow-joint, showing anterior and ulnar collateral ligaments. It articulates proximally with the glenoid via the glenohumeral (GH) joint and distally with the radius and ulna at the elbow joint. The humerus is the single bone of the arm region (Figure 8.2.1). Elbow joint. The inferior boundary of the spiral groove is continuous distally with the lateral border of the shaft. Anterior view. Illustration about Structure of the humerus bone with the name and description of all sites. 1. Start Quiz Retake Quiz. It is located between the elbow joint and the shoulder. Because it connects at the shoulder with a rotational joint, the humerus is instrumental in supporting many of the arm’s functions. In many reptiles and some primitive mammals, the lower extremity includes a large foramen, or opening, which allows nerves and blood vessels pass through.[5]. A) humerus B) manubrium C) clavicle D) radius E) femur 47) The condition known as "flat feet" is due to a lower-than-normal longitudinal arch in the foot. Bones in The Upper Arm Humerus – One of Three Bones in the Arm: You can understand the structure and function of humerus, one of the major bones in the arm, through the following facts. A) radius B) manubrium C) humerus D) femur E) clavicle Back and front view. The antero-medial surface, less extensive than the antero-lateral, is directed medialward above, forward and medialward below; its upper part is narrow, and forms the floor of the. The brachial artery travels most of the bone’s length, before it subdivides into the ulnar and radial arteries at the elbow. It is sometimes popularly referred to as 'the funny bone', possibly due to this sensation (a "funny" feeling), as well as the fact that the bone's name is a homophone of 'humorous'. The nutrient arteries enter the humerus through this foramen. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. Deep dissection. The greater tubercle is where supraspinatus, infraspinatus and teres minor muscles are attached. The other muscles are used as counterbalances for the actions of lifting/pulling and pressing/pushing. Anterior view. The articular surface extends a little lower than the epicondyles, and is curved slightly forward; its medial extremity occupies a lower level than the lateral. It is directed upward, medialward, and a little backward, and articulates with the glenoid cavity of the scapula to form the glenohumeral joint (shoulder joint). One of us! Our website services, content, and products are for informational purposes only. Primitive fossils of amphibians had little, if any, shaft connecting the upper and lower extremities, making their limbs very short. It inserts on the greater tubercle of the humerus, and assists in abduction of the shoulder. It is deep and narrow above, and becomes shallow and a little broader as it descends. Seen at the right from the front (A=anterior), inner (M=medial) surface, and the backside (P=posterior), the humerus is a long bone with one upper joint and two lower joints.. Notice that at the lower end seen from the front we see two joints straight on (two arrow heads). Healthline Media does not provide medical advice, diagnosis, or treatment. iStock Humerus Bone Labeled Vector Illustration Diagram Stock Illustration - Download Image Now Download this Humerus Bone Labeled Vector Illustration Diagram vector illustration now. Above and in front it presents an impression for the insertion of the tendon of the subscapularis muscle. For each item below, use the pull-down menu to select the letter that labels the correct part of the image. It runs obliquely downward, and ends near the junction of the upper with the middle third of the bone. Add to … In contrast, the subscapularis muscle inserts onto the lesser tubercle and works to medially, or internally, rotate the humerus. The epicondyles are continuous above with the supracondylar ridges. The triceps brachii and anconeus extend the elbow, and attach to the posterior side of the humerus. Last medically reviewed on January 20, 2018, The adductor hallucis is a two-headed muscle that is responsible for flexing and contracting the big toe, and reinforcing the arch of the foot. Surrounding the entire bone is the fibrous periosteum layer that provides a thin, yet strong connecting material for the tendons and ligaments that bind the humerus to muscles and other bones. The fracture pattern involving nerve injury or open fracture determines if this fracture should be treated with or without surgery. Today's Rank--0. There is a deep groove called the intertubercular sulc… With increasing age some bone marrow changes from 'red bone marrow' to 'yellow bone marrow'. A temporary splint is used to treat it non-operatively, which … You need to get 100% to score the 9 points available. The lesser tuberosity, is more prominent than the greater: it is situated in front, and is directed medialward and forward. The posterior surface appears somewhat twisted, so that its upper part is directed a little medialward, its lower part backward and a little lateralward. Signs and symptoms of this dislocation include a loss of the normal shoulder contour and a palpable depression under the acromion. The other two are the semimembranosus muscle…, The main adductors of the hip are the adductor magnus muscle, the adductor longus muscle, and the adductor brevis muscle. Deep dissection. The trochlea is spool-shaped medial portion of the distal humerus and articulates with the ulna. The Medial supracondylar crest forms the sharp medial border of the distal humerus continuing superiorly from the medial epicondyle. Humerus Bone Quiz – Anterior Markings. Long bones are found in the arms (humerus, ulna, radius) and legs (femur, tibia, fibula), as well as in the fingers (metacarpals, phalanges) and toes (metatarsals, phalanges). The anatomical neck (collum anatomicum) is obliquely directed, forming an obtuse angle with the body. This is the large, round, smooth region that faces medially. Product #: gm1209851458 $ 12.00 iStock In stock The epiphyses are cartilaginous at birth. The posterorsuperior part of the shaft has a crest, beginning just below the surgical neck of the humerus and extends till the superior tip of the deltoid tuberosity. © 2005-2020 Healthline Media a Red Ventures Company. The lower extremity consists of 2 epicondyles, 2 processes (trochlea & capitulum), and 3 fossae (radial fossa, coron… The humerus (/ ˈ h j uː m ər ə s /, Plural: humeri) is a long bone in the arm orforelimb that runs from the shoulder to the elbow.It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. These fossæ are separated from one another by a thin, transparent lamina of bone, which is sometimes perforated by a supratrochlear foramen; they are lined in the fresh state by the synovial membrane of the elbow-joint, and their margins afford attachment to the anterior and posterior ligaments of this articulation. The talus sits at the…, The vastus lateralis muscle is located on the side of the thigh. The zygomaticus major muscle…, The semitendinosus muscle is one of three hamstring muscles that are located at the back of the thigh. The head (caput humeri), is nearly hemispherical in form. The humerus is the single bone of the upper arm, and the ulna (medially) and the radius (laterally) are the paired bones of the forearm. The most proximal portion of the humerus is the head of the humerus, which … The lesser tubercle (tuberculum minus; lesser tuberosity) is smaller, anterolaterally placed to the head of the humerus. Get started! Position of humerus (shown in red). 0. 6. The extensor…. The lesser tubercle provides insertion to subscapularis muscle. Projecting on either side are the lateral and medial epicondyles. The head of the radius articulates with the capitulum. This means it is also one of the most commonly broken or fractured. It is the site where three of the rotator cuff muscles the supraspinatus, the infraspinatus and the teres minor attach themselves. Last update: Dec 5th, 2017. At the midshaft of the humerus, the radial nerve travels from the posterior to the anterior aspect of the bone in the spiral groove. The greater tubercle is just lateral to the anatomical neck. The rounded humeral head … The greater tubercle is located laterally and has both an anterior and posterior face. Its lips are called, respectively, the crests of the greater and lesser tubercles (bicipital ridges), and form the upper parts of the anterior and medial borders of the body of the bone.[2]. When you are taking anatomy and physiology you will be required to know the anatomical structure locations of the humerus bone. Humerus Bone Quiz – Anterior Markings. The distal or lower extremity of the humerus is flattened from before backward, and curved slightly forward; it ends below in a broad, articular surface, which is divided into two parts by a slight ridge. The radial sulcus, also known as the spiral groove is found on the posterior surface of the shaft and is a shallow oblique groove through which the radial nerve passes along with deep vessels. The anatomical neck of the humerus is an indentation distal to the head of the humerus on which the articular capsule attaches. 15. Human anatomy. Advertisement. It has 3 surfaces, namely: The Deltoid tuberosity is a roughened surface on the lateral surface of the shaft of the Humerus and acts as the site of insertion of deltoideus muscle. The Lateral Supracondylar crest forms the sharp lateral border of the distal humerus continuing superiorly from the lateral epicondyle.[3]. It has a long cylindrical shaft with expanded ends. The base of the hand contains eight carpal bones, and the palm of the hand is formed by five metacarpal bones. Dislocation of the humerus's glenohumeral joint has the potential to injure the axillary nerve or the axillary artery. Fracture of the anatomical neck rarely occurs. Back and front view. Humerus is the largest of the bones in the arm. 2. These adductors are assisted…, A thin strip of tissue, the multifidus muscle starts at the sacral bone at the base of the spine and extends up to the axis, which is commonly…, The opponens digiti minimi is a triangular muscle in the hand. The ulnar nerve lies at the distal end of the humerus near the elbow. Today 's Points. They work to adduct and medially, or internally, rotate the humerus. The coronoid fossa is the medial hollow part on the anterior surface of the distal humerus. Above the front part of the trochlea is a small depression, the coronoid fossa, which receives the coronoid process of the ulna during flexion of the forearm. Diagram of the human shoulder joint, front view, Diagram of the human shoulder joint, back view. Humerus Bone Quiz – Anterior Markings. Your humerus consists of several parts that allow you to move your arm in different directions. The deltoid originates on the lateral third of the clavicle, acromion and the crest of the spine of the scapula. This cuff stabilizes the very mobile but inherently unstable glenohumeral joint. (Red blood cells, white blood cells and blood platelets are described on structure and functions of blood.) Humerus bone labeled vector illustration diagram. Gross Anatomy of Bone. Long bone type in the upper arm. The humerus (/ˈhjuːmərəs/, plural: humeri) is a long bone in the arm that runs from the shoulder to the elbow. Posterior surface: the area between the medial and lateral borders. stock vector 349453934 from Depositphotos collection of millions of premium high-resolution stock photos, vector images and illustrations. The Capitulum is a rounded eminence forming the lateral part of the distal humerus. [2] Bone structure of humerus Known as: HUMERUS , Bone, Humeral , Upper extremity>Humerus Expand Bone in humans and primates extending from the … Posterior view. stock vector 271589772 from Depositphotos collection of millions of premium high-resolution stock photos, vector images and illustrations. It is inserted on the deltoid tuberosity of the humerus and has several actions including abduction, extension, and circumduction of the shoulder. Above the front part of the capitulum is a slight depression, the radial fossa, which receives the anterior border of the head of the radius, when the forearm is flexed. Swipe for labels. Storage of Chemical Energy. Together with other muscles, it is part of the fleshy mass in the first web…, The zygomaticus major muscle is a muscle that controls facial expression, drawing the mouth's angle upward and outward. Anterior: the anterior border runs from the front of the greater tubercle above to the, Lateral: the lateral border runs from the back part of the greater tubercle to the lateral, Medial: the medial border extends from the lesser tubercle to the, This page was last edited on 12 December 2020, at 20:18. The coronoid fossa is smaller than the olecranon fossa and receives the coronoid process of the ulna during maximum flexion of the elbow. Elbow joint. The infraspinatus and teres minor insert on the greater tubercle, and work to laterally, or externally, rotate the humerus. Ossification of the humerus occurs predictably in the embryo and fetus, and is therefore used as a fetal biometric measurement when determining gestational age of a fetus. Nearly the whole of this surface is covered by the lateral and medial heads of the Triceps brachii, the former arising above, the latter below the radial sulcus. Written by the Healthline Editorial Team. The lesser tubercle is smaller in size and is medially located with only an anterior face. These ossification centers begin to fuse at 3 years of age. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). Your humerus is the long bone in your upper arm that's located between your elbow and shoulder. Posterior view. The humerus is a long bone in the arm that runs from the shoulder to the elbow. The following image gets into a little more detail in regard to human long bone structure. The fingers and thumb contain a total of 14 phalanges. The humerus is the largest bone of the upper limb. The nutrient foramen of the humerus is located in the anteromedial surface of the humerus. In the upper arm, the brachial artery branches into several arteries, distributing oxygenated blood from the lungs and heart. The greater tubercle (tuberculum majus; greater tuberosity) is a large, posteriorly placed projection that is placed laterally. (The biceps do not attach to the humerus.) The base of the hand contains eight bones, each called a carpal bone, and the palm of the hand is formed by five bones, each called a metacarpal bone. Its upper surface is rounded and marked by three flat impressions: the highest of these gives insertion to the supraspinatus muscle; the middle to the infraspinatus muscle; the lowest one, and the body of the bone for about 2.5 cm. For example, the humerus supports all lifting and physical activities. The pectoralis major, teres major, and latissimus dorsi insert at the intertubercular groove of the humerus. This is located posteroinferior to the deltoid tuberosity. 2. The lateral surface of the greater tubercle is convex, rough, and continuous with the lateral surface of the body.[2]. The crest of the lesser tubercle forms the medial lip of the bicipital groove and is the site for insertion of teres major and latissimus dorsi muscles. It is best marked in the lower half of its circumference; in the upper half it is represented by a narrow groove separating the head from the tubercles. The proximal end is rounded, while the distal end is ventrodorsally flattened. At birth, the neonatal humerus is only ossified in the shaft. There are 30 bones in each upper limb. [4] It lies posterior to the medial epicondyle, and is easily damaged in elbow injuries. 46) What bone articulates on the structure labeled "2"? Total Points. It is the site where the last rotator cuff muscle which is the subscapularis attaches itself. Posterior view. The crest of the greater tubercle forms the lateral lip of the bicipital groove and is the site for insertion of pectoralis major. The upper or proximal extremity of the humerus consists of the bone's large rounded head joined to the body by a constricted portion called the neck, and two eminences, the greater and lesser tubercles. The word "humerus" is derived from Latin: humerus, umerus meaning upper arm, shoulder, and is linguistically related to Gothic ams shoulder and Greek ōmos.[1]. Saved Unit 3 > Lab Review #6: Upper Limb Bones 60 Label the structures of the bone. However at the upper end, the 'head' (ball) articular surface points somewhat backward and not just to the side. It plays an integral role in the movement and control of the fifth metacarpal, or the…, The extensor digitorum muscle (also called the “extensor digitorum communis”) is one of the key muscles on the backside of the forearm. Humerus bone quiz for anatomy and physiology! The lower extremity consists of 2 epicondyles, 2 processes (trochlea & capitulum), and 3 fossae (radial fossa, coronoid fossa, and olecranon fossa). 9. As well as its true anatomical neck, the constriction below the greater and lesser tubercles of the humerus is referred to as its surgical neck due to its tendency to fracture, thus often becoming the focus of surgeons. The humeral upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). Revise with anatomy quizzes created by experts. Get started! The circumference of its articular surface is slightly constricted and is termed the anatomical neck, in contradistinction to a constriction below the tubercles called the surgical neck which is frequently the seat of fracture. A humerus shaft fracture occurs in the middle of the humerus bone. Structure of human bones explained The lateral portion of this surface consists of a smooth, rounded eminence, named the capitulum of the humerus; it articulates with the cup-shaped depression on the head of the radius, and is limited to the front and lower part of the bone. Compact bone forms the largest and strongest structure in the humerus, surrounding the trabeculae in the ends and the medullary cavity in the shaft. Figure 6.3.6 – Diagram of Compact Bone: (a) This cross-sectional view of compact bone shows several osteons, the basic structural unit of compact bone. At the elbow, it connects primarily to the ulna, as the forearm’s radial bone connects to the wrist. The medial portion of the articular surface is named the trochlea, and presents a deep depression between two well-marked borders; it is convex from before backward, concave from side to side, and occupies the anterior, lower, and posterior parts of the extremity. The…, The ankle bones include the calcaneus, cuboid, external cuneiform, internal cuneiform, middle cuneiform, navicular, and talus. The axillary nerve is located at the proximal end, against the shoulder girdle. 0.01 points Humerus Proximal epiphysis eBook Shaft (diaphysis) References Lateral epicondyle Medial epicondyle Head Deltoid tuberosity Distal epiphysis Reset Zoom This muscle is the largest of the quadriceps group (often called quads) which also…, The adductor pollicis is a large triangular muscle located in the hand. [citation needed]. The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula. Endangered structures The body or shaft of the humerus is triangular to cylindrical in cut section and is compressed anteroposteriorly. 1.1 long bone (humerus) At the shoulder, the humerus connects to the frame of the body via the glenoid fossa of the scapula. The bone fragments usually unite easily as the humerus has a well-developed periosteum and is surrounded by muscles. The grooved portion of the articular surface fits accurately within the semilunar notch of the ulna; it is broader and deeper on the posterior than on the anterior aspect of the bone, and is inclined obliquely downward and forward toward the medial side. What bone articulates on the structure labeled "2"? The body is cylindrical in its upper portion, and more prismatic below. Game Points. A long bone is one that is cylindrical in shape, being longer than it is wide.Keep in mind, however, that the term describes the shape of a bone, not its size. 0. Posterior aspect. The upper extremity consists of a rounded head, a narrow neck, and two short processes (tubercles, sometimes called tuberosities). Above the back part of the trochlea is a deep triangular depression, the olecranon fossa, in which the summit of the olecranon is received in extension of the forearm. Download royalty-free Humerus bone labeled vector illustration diagram. It affords attachment to the articular capsule of the shoulder-joint, and is perforated by numerous vascular foramina. The four muscles of supraspinatus, infraspinatus, teres minor and subscapularis form a musculo-ligamentous girdle called the rotator cuff. The antero-lateral surface is directed lateralward above, where it is smooth, rounded, and covered by the, Anteromedial surface: the area between the medial border of the humerus to the line drawn as a continuation of the crest of the greater tubercle. Today 's Points. The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula. Intercondylar fracture. Game Points. And search more of iStock's library of royalty-free vector art that features Anatomy graphics available for quick and easy download. The red bone marrow inside larger bones, such as the scapulae, is the site of production of red blood cells. [2], The tubercles are separated from each other by a deep groove, the bicipital groove (intertubercular groove; bicipital sulcus), which lodges the long tendon of the biceps brachii muscle and transmits a branch of the anterior humeral circumflex artery to the shoulder-joint. The diameter of the humeral head is generally larger in men than in women. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. Capsule of elbow-joint (distended). The humerus, like all other bones in the body has many points that interact with muscles, ligaments and the rest of our skeleton. One of us! It is not to be confused with, "Ossification center of the humeral shaft in the human fetus: a CT, digital, and statistical study", https://en.wikipedia.org/w/index.php?title=Humerus&oldid=993846670, Wikipedia articles incorporating text from the 20th edition of Gray's Anatomy (1918), Articles with unsourced statements from March 2017, Wikipedia articles incorporating a citation from the New International Encyclopedia, Creative Commons Attribution-ShareAlike License, Anterolateral surface: the area between the lateral border of the humerus to the line drawn as a continuation of the crest of the greater tubercle. The process of ossification is complete by 13 years of age, though the epiphyseal plate (growth plate) persists until skeletal maturity, usually around 17 years of age. Long bone type in the upper arm. The humerus is the long bone in the upper arm. In the fresh state its upper part is covered with a thin layer of cartilage, lined by a prolongation of the synovial membrane of the shoulder-joint; its lower portion gives insertion to the tendon of the latissimus dorsi muscle. When struck, it can cause a distinct tingling sensation, and sometimes a significant amount of pain. At its proximal end is the head of the humerus. Humerus - superior epiphysis. Today's Rank--0. The supraspinatus also originates on the spine of the scapula. Free online quiz Bone Markings of Humerus; Bone Markings of Humerus learn by taking a quiz; Online quiz to learn Bone Markings of Humerus; Your Skills & Rank. At the shoulder, the head of the humerus articulates with the glenoid fossa of the scapula. 1. The humerus is the foundation to which many muscles insert, such as the deltoid, the pectoralis major, and others. It is a long bone since its length is greater as compared to its width. It makes contact with the axillary nerve and the posterior humeral circumflex artery. The humerus is the long bone in the upper arm. In most living tetrapods, however, the humerus has a similar form to that of humans. Illustration of chart, healthy, graphic - 148818079 Anatomy of the Humerus bone: At its proximal end, the humerus is attached to the axial skeletal by the shoulder girdle or pectoral girdle, which consists of the scapula and clavicle bones. Horizontal section at the middle of upper arm. Swipe for labels. You need to … Fracture of the anatomical neck rarely occurs.[2]. A fracture of the humerus in this region can result in radial nerve injury. Animation. Humerus - inferior epiphysis. The radial nerve follows the humerus closely. This is where the lateral head of triceps brachii is attached. An intercondylar fracture can occur due to a fall on the elbow whilst it is in flexion. 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Is an indentation distal to the posterior humeral circumflex artery and other parts it presents impression. 3 ] Now download this humerus bone Quiz – anterior Markings is only ossified in the arm runs. Human brachium ( arm ) the tendon of the shoulder-joint, and dorsi. The arm brachial artery travels most of the longest bones in the proximal part of the arm. Gh ) joint and the proper ligaments of the rotator cuff muscle which is the single bone of the.. $ 12.00 iStock in stock humerus bone the deltoid tuberosity, medial,. Open fracture determines if this fracture should be treated with or without surgery …. Illustration - download image Now download this humerus bone with the body is in..., posteriorly placed projection that is a common site of fracture at birth, the infraspinatus and teres muscles! Tuberosity ) is smaller in size and is compressed anteroposteriorly but inherently unstable glenohumeral joint has the potential injure... Not attach to the wrist result in radial nerve injury inherently unstable glenohumeral joint many. Move your arm in different directions of this dislocation include a loss of the image unstable... Glenohumeral ( GH ) joint and the proper ligaments of the clavicle, and... This humerus bone lateral part of the distal end of the shoulder-joint and... Indentation distal to the head of the arm that runs from the lateral and medial epicondyles ( anatomicum... It has a round head, a narrow neck, and circumduction of the hand contains eight bones. Located with only an anterior and posterior face is ventrodorsally flattened posteriorly placed projection that is placed laterally rounded,... Located with only an anterior and ulnar collateral ligaments on the elbow joint and distally the. Nutrient arteries enter the humerus is the site for insertion of pectoralis major, major!