. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. 1'he Skeleton 6,1 structures, like horns or fangs, any longer necessary, since the swinging arms take the place of such organs of defence. The entire arm is pivoted to the pectoral girdle by a ball-and-socket joint which allows great freedom of motion. Other joints between the separate arm bones, while limiting the range of motion in each instance, insure a gain in strength and effectiveness. Thus, at the elbow there is a hinge joint that /f -y Humerus â R
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. 1'he Skeleton 6,1 structures, like horns or fangs, any longer necessary, since the swinging arms take the place of such organs of defence. The entire arm is pivoted to the pectoral girdle by a ball-and-socket joint which allows great freedom of motion. Other joints between the separate arm bones, while limiting the range of motion in each instance, insure a gain in strength and effectiveness. Thus, at the elbow there is a hinge joint that /f -y Humerus â Radius. / NDigitI ^DigitH" Fig. 561. Fore-limb of an embryo tern, Sterna. (After Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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Keywords: ., bookcentury1900, booksubjectanatomycomparative, booksubjectverte
