Digestive and Excretory System

Crayfish Dissection for Biology 110

Penn State Altoona Biology
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VI.) Digestive and Excretory Systems

1. Trace the digestive system from the mouth through the esophagus to the cardiac stomach, where the food is ground up.

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2.  From the stomach, food travels to the intestine, where it is absorbed into the blood stream.

3. Next, food waste is expelled through the anus.

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4. Find the green gland located internally just behind each antenna and right under the brain.  These structures filter fluid waste from the blood.


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