Refer to the figure showing the digestive systems of two animals. 
How do the structures marked 1 and 2 compare with each other?
A) Both secrete HCl and proteases for digesting proteins.
B) Both contain fermented food and microorganisms.
C) Structure 1 contains undigested cellulose and structure 2 contains digested cellulose.
D) Structure 1 receives enzymes from the pancreas and structure 2 does not.
E) Both function to store food and deliver it gradually to the small intestine.
Correct Answer:
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