1. Analyzing Concepts Why is it important that the large intestine reabsorb water and not
eliminate it?
2. Predicting Patterns The loop of Henle functions to conserve water by aiding in reabsorption. Its
length varies among mammal species. Would you expect the loop of Henle of an animal such as the
beaver, which lives in a watery environment, to be longer or shorter than that found in humans? Explain your answer.
3. Recognizing Relationships Look at the pictures of the teeth of different animals. What can you tell about the human diet by comparing the teeth of humans with those of other animals shown here?
