. Biology and human life. Biology. Fig. 131. Homologies in the bones of the hind leg Walking, crawling, swimming, loping — all the various modes of locomotion found among backboned animals — are carried on by organs having the same fundamental structure. A, ankle bones: a, man; b, lion; c, wolf; d, duck; e, crocodile; /, seal in the way he "winks" (see Fig. 128). Fishes have no eyelids at all, and in snakes the eyelids are always closed but transparent. The nostrils in the frog correspond to ours and lead into the mouth cavity; they can be closed. In all vertebrates the breathing org
. Biology and human life. Biology. Fig. 131. Homologies in the bones of the hind leg Walking, crawling, swimming, loping — all the various modes of locomotion found among backboned animals — are carried on by organs having the same fundamental structure. A, ankle bones: a, man; b, lion; c, wolf; d, duck; e, crocodile; /, seal in the way he "winks" (see Fig. 128). Fishes have no eyelids at all, and in snakes the eyelids are always closed but transparent. The nostrils in the frog correspond to ours and lead into the mouth cavity; they can be closed. In all vertebrates the breathing organs are connected with the mouth, but in none of the invertebrates. The tongue is a muscular outgrowth. 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 Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965. Boston, New York [etc. ] Ginn and Company
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology
