Diagram of the different parts of the human digestive system.
Pig stomach. Esophagus was attached at upper right and small intestine was attached at upper left.
Cow stomach, with openings cut into some of the separate chambers. Esophagus is shown at the top. Cud chewing animals (sheep, cows, goats, camels, and others that eat mostly grass) must have separate stomach chambers for prolonged digestion, because grass is difficult to digest.
Activity: dissection

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