Animal life in the sea and on the land . Fig. 248.—Reindeer Digging in Snow. 9. In the first place, we must notice that these animals have no incisors on the upper jaw, and the grass is drawn into the mouth with their long tongues and bitten off against the hard upper gum. When swallowed, the food 16 362 ANIMAL LIFE IN THE SEA AND ON THE LAND. enters the first large stomach, or paunch, where it ismoistened with digestive juices, and then passes into the reticulum, the inner surface of which is divided intosmall cells like a honey-comb. Here the food is pressedinto little balls, which, by a pro
Animal life in the sea and on the land . Fig. 248.—Reindeer Digging in Snow. 9. In the first place, we must notice that these animals have no incisors on the upper jaw, and the grass is drawn into the mouth with their long tongues and bitten off against the hard upper gum. When swallowed, the food 16 362 ANIMAL LIFE IN THE SEA AND ON THE LAND. enters the first large stomach, or paunch, where it ismoistened with digestive juices, and then passes into the reticulum, the inner surface of which is divided intosmall cells like a honey-comb. Here the food is pressedinto little balls, which, by a process of muscular contrac-tion exactly opposite to that of swallowing, return to themouth to be eaten over Fig. 249.—Travelling in Lapland. 10. The food, on being swallowed the second time, de-scends to the third cavity, and in doing so you will seethat it must pass directly over the openings into the firstand second stomachs; but the lip-like edges of these open-ings seem to have the power of selecting what shall bereceived and what shall be allowed to pass by. 11. This third cavity is called the many-plies, fromfolds in the lining which resemble the leaves of a fourth stomach, the abomasum, supplies the gastricjuice, and it is the true organ of digestion. 12. Manner of Feeding suited to timid Animals. — Howadmirably this manner of receiving food is suited to the DEER. 363
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1887
