. Animal activities; a first book in zoo?logy. Zoology; Animal behavior. l82 ANIM/IL ACTIVITIES. saliva which holds the fly a prisoner until the jaws close over him. The ease and quickness with which an insect disappears are always a surprise to the observer. When feeding on large animals the frog seizes his prey with jaws and front legs, and hurriedly crowd- ing his luckless victim into his mouth, swallows him alive. Teeth are present on the upper jaw and on the palate or roof of the mouth. Taking Oxygen. When the young frog emerges from the egg it takes air from the water by means of externa
. Animal activities; a first book in zoo?logy. Zoology; Animal behavior. l82 ANIM/IL ACTIVITIES. saliva which holds the fly a prisoner until the jaws close over him. The ease and quickness with which an insect disappears are always a surprise to the observer. When feeding on large animals the frog seizes his prey with jaws and front legs, and hurriedly crowd- ing his luckless victim into his mouth, swallows him alive. Teeth are present on the upper jaw and on the palate or roof of the mouth. Taking Oxygen. When the young frog emerges from the egg it takes air from the water by means of external gills. Into these the blood is pumped directly from the heart, as in fishes. Here the oxygen passes into the blood for purification, and thence is conveyed to all parts of the body. In a few days these external gills disappear, and other gills grow under the opercular membrane. This. Fig. 135.—Tongue of a 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 French, Nathaniel Stowers, 1854-. New York [etc. etc. ] Longmans, Green and Co
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