Refer to the figure showing the digestive system of two animals. What are the structures labeled "A" and "B?" How are these structures similar in the way in which they produce nutrients, and how do they differ?

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Refer to the figure showing the digestive system of two animals.  What are the structures labeled "A" and "B?" How are these structures similar in the way in which they produce nutrients, and how do they differ?

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The Answer of Refer to the figure showing the digestive system of two animals.  What are the structures labeled "A" and "B?" How are these structures similar in the way in which they produce nutrients, and how do they differ?

Refer to the Figure Showing the Digestive System of Two