. A treatise on anatomy, physiology, and hygiene : designed for colleges, academies, and families. which forms the point of the elbow. G, Space between the radiusand ulna, filled by the intervening ligament. 7, Styloid process of the ulna. 8, Sur-face of the radius and the ulna, where they articulate with the bones of the , Styloid process of the radius. 100. The ulna articulates with the humerus at the elbow,and forms a perfect hinge-joint. This bone is situated on theinner side of the fore-arm. What is represented by fig. 13? By fig. 14? 100. Describe the ulna. ANATOMY OF THE BONES. 4
. A treatise on anatomy, physiology, and hygiene : designed for colleges, academies, and families. which forms the point of the elbow. G, Space between the radiusand ulna, filled by the intervening ligament. 7, Styloid process of the ulna. 8, Sur-face of the radius and the ulna, where they articulate with the bones of the , Styloid process of the radius. 100. The ulna articulates with the humerus at the elbow,and forms a perfect hinge-joint. This bone is situated on theinner side of the fore-arm. What is represented by fig. 13? By fig. 14? 100. Describe the ulna. ANATOMY OF THE BONES. 41 101. The radius articulates with the bones of the carpus,and forms the wrist-joint. This bone is situated on the out-side of the fore-arm, (the side on which the thumb is placed.)The ulna and radius, at their extremities, articulate with eachother, by which union the hand is made to rotate, permittingits complicated and varied movements. 102. The carpus is composed of eight bones, ranged intwo rows, and so firmly bound together, as to permit only asmall amount of movement. Fig. 15. Fig. Fig. 15. u, The ulna. R, The radius. S, The scaphoid hone. L, The semilunarbone, c, The cuneiform bone. P,The pisiform bone. These four form the first row ofcarpal bones, t, t, The trapezium and trapezoid bones, m, The os magnum, u, Theunciform bone. These four form the second row of carpal bones. 1, 1, 1, 1, 1, Themetacarpal bones of the thumb and fingers. Fig. 16. 10, 10, 10, The metacarpal bones of the hand. 11, 11, First range of fin-ger-bones. 12, 12, Second range of finger-bones. 13, 13, Third range of , 15, Bones of the thumb. 103. The metacarpus is composed of five bones, upon fourof which the first range of the finger-bones is placed ; and 101. The radius. 102. How many bones in the carpus ? How are theyranged ? 103. Describe the metacarpus. 42 ANATOMY, PHYSIOLOGY, AND HYGIENE. upon the other, the first bone of the thumb. The five meta-carpal bones articulate with
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