Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . ectly developed, ph, Bones of the hand and fingers. /, Thethigh-bone, t, The two bones of the leg. ta, The shank or ankle bones. Figure 3. Skeleton of Turtle.—a, Cervical vertebrae, b, Scapula, c, Clavicle, d, Coracoid-bone. e, Dorsal vertebra?. /, Ribs incorporated with the dermal plates whichform the shell, g, Marginal plates. A, Pubic bones, i, Femur, k, Tibia. I, Fibula. Figure 4. Skeleton of the Pe
Class-book of physiology : for the use of schools and families : comprising the structure and functions of the organs of man, illustrated by comparative reference to those of inferior animals . ectly developed, ph, Bones of the hand and fingers. /, Thethigh-bone, t, The two bones of the leg. ta, The shank or ankle bones. Figure 3. Skeleton of Turtle.—a, Cervical vertebrae, b, Scapula, c, Clavicle, d, Coracoid-bone. e, Dorsal vertebra?. /, Ribs incorporated with the dermal plates whichform the shell, g, Marginal plates. A, Pubic bones, i, Femur, k, Tibia. I, Fibula. Figure 4. Skeleton of the Perch.—a, b, First and second dorsal fins, c, The caudal or tail-fin. d, The anal-fin. , One of the ventral fins, which correspond to the legs. /,One of the pectoral fins, which are analogous to the arms. The spinous processes of thevertebra? are long, and are connected with another set of bones, by which they are con-tinued upward, so as to form the frame-work of the fins which arise from the back. Thewhole number of vertebra? is forty-two, of which twenty-one are dorsal and twenty-onecaudal or coccygeal. The number of pairs of ribs is the same as that of the dorsal ANIMAL MOTION. 219 formed, which yields for a moment to the shock, and thenrecovers itself. 451. In animals which walk on all-fours, the differenceof direction in which the bones of the legs are connectedwith the spine, prevents a jar from extending to the those animals which obtain their food by sudden andextensive leaps—such as the cat, tiger, and lion—there isan arrangement of the bones admirably adapted to dimin-ish the shock produced by a sudden descent of the bodyupon the ground. THE MUSCLES. 452. The muscles are the moving power by which theparts of the skeleton are set in motion. 453. Each muscle, if examined carefully, is found to bemade of a number of bundles of fibres, and each fibre isformed of numerous smaller fibres or fibrils. The primi-tive fibrils are only about ^h of
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectphysiologicalprocess
