animal Digestion

1. an opening that allows air, gas, or liquid to pass out of or into a confined space.
4. the part of the small intestine between the duodenum and ileum.
5. a muscular, thick-walled part of a bird's stomach for grinding food, typically with grit.
9. an even-toed ungulate mammal that chews the cud regurgitated from its rumen. The ruminants comprise the cattle, sheep, antelopes, deer, giraffes, and their relatives.
10. the muscular third stomach of a ruminant animal, between the reticulum and the abomasum.
12. the fourth stomach of a ruminant, which receives food from the omasum and passes it to the small intestine.
13. The last part of the small intestine
14. domestic fowl, such as chickens, turkeys, ducks, and geese.

2. are animals with a single-compartment stomach
3. the part of the alimentary canal that connects the throat to the stomach; the gullet. In humans and other vertebrates it is a muscular tube lined with mucous membrane.
6. the first part of the small intestine immediately beyond the stomach, leading to the jejunum.
7. Tube like structure
8. the second stomach of a ruminant, having a honeycomb-like structure, receiving food from the rumen and passing it to the omasum.
11. an opening or entrance to a structure that is hollow, concave, or almost completely enclosed.