Essentials of Biology Presented in Problems By George William Hunter
Essentials of Biology Presented in Problems By George William Hunter
George William Hunter
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On the lower floor of the mouth can be seen the slitlike glottis leading to the lungs. The gullet widens almost at once into a long stomach, which in turn leads into a much- Ba^bone Oviduct Spinal cord rcun Liver ^Pancreas Diagram of the internal anatomy of a frog. Coiled intestine. This widens abruptly at the lower end to form the large intestine. This in turn leads into the cloaca (Latin, sewer) into which open the kidneys, urinary bladder, and repro- ductive organs (ovaries or spermaries). S...everal glands, the function of which is to produce digestive fluids, open into the food tube. These digestive fluids, by means of the ferments or enzymes contained in them, change insoluble food materials into a soluble form. This allows of the absorption of food material through the walls of the food tube into the blood. The glands (having the same names and uses as those in man) are the salivary glands, which pour their juices into the mouth, the gastric glands in the walls of the stomach, and the liver and pancreas, which open into the intestine.
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