. The biology of the frog. Frogs. THE SKELETON 257. ft humerus to about the middle of the ventral side. At the distal end of the humerus there is a ridge above each of the two condyles; the inner ridge is much larger in the male than in the female. The skeleton of the forearm consists of the radio-ulna, which arises from the fusion of two originally distinct bones, the radius and ulna, the line of union between which is very marked, es- pecially at the distal end. The postaxial or ulnar part is pro- duced backward at its upper end to form the olecranon, which fits over the rounded end of the h
. The biology of the frog. Frogs. THE SKELETON 257. ft humerus to about the middle of the ventral side. At the distal end of the humerus there is a ridge above each of the two condyles; the inner ridge is much larger in the male than in the female. The skeleton of the forearm consists of the radio-ulna, which arises from the fusion of two originally distinct bones, the radius and ulna, the line of union between which is very marked, es- pecially at the distal end. The postaxial or ulnar part is pro- duced backward at its upper end to form the olecranon, which fits over the rounded end of the humerus at the joint of the elbow. The distal end of the radio- ulna is widened, and ends in two epi- physes, one for each of the component bones. The carpus, or wrist of the frog, contains six bones ar- ranged in two rows. In the proximal row the ulnare and radiate are situated at the ends of the ulna and radius, re- spectively, and at the inner or preaxial side of the radiale is the centrale. In the distal row the first carpal occurs just Fig. 85.—Longitudinal sections of the larg- er bones of the limbs. A, humerus; B, radio-ulna; C, femur; D, tibio-fibula. cn, condyle; /, foramen for artery; fi, fibula; hd, head; ra, marrow; ol, ole- cranon ; p, bony partition; ra, radius; sh, shaft; ti, tibia; ul, ulna. (After Parker and Parker.). 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 Holmes, Samuel J. (Samuel Jackson), 1868-. New York : The Macmillan company
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Keywords: ., bookauthorholmessamueljsamuelja, bookcentury1900, bookdecade1920
