. Elementary biology, animal and human. Biology. 68 ANIMAL BIOLOGY 50, A). On the sides of the shaft are the two flat surfaces which make up the vane. This vane is composed of slender parts called harhs that may be easily separated from each other, or when sep- arated may be read- ily united, because of little hooks (Fig. 50, B). This the bird does when it smooths or "preens" its feathers. 52. Legs.— On comparing the arm of man with the wing of a bird we found that they were similar in structure, and the same is likewise true of the leg and foot. While the thigh of a bird is much sho
. Elementary biology, animal and human. Biology. 68 ANIMAL BIOLOGY 50, A). On the sides of the shaft are the two flat surfaces which make up the vane. This vane is composed of slender parts called harhs that may be easily separated from each other, or when sep- arated may be read- ily united, because of little hooks (Fig. 50, B). This the bird does when it smooths or "preens" its feathers. 52. Legs.— On comparing the arm of man with the wing of a bird we found that they were similar in structure, and the same is likewise true of the leg and foot. While the thigh of a bird is much shorter proportionately than is that of man (Fig. 51), both have but a single bone. Below the knee of the. bird is the shank or "drum- stick" which consists of a long bone ex- tending to the ankle, and beside it is a slender bone attached only at the upper end. This region in the leg of man is likewise composed of a relatively thick shin bone, on the outer side of which is a thin bone extending down to the Fig. 51. — A, skeleton of leg of an ostrich; B, ;j skeleton of leg of a man. (E. R. Sanborn.). 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 Peabody, James Edward, b. 1869; Hunt, Arthur Ellsworth, joint author. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1912
