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The ___________________________ system is made up of several glands that act in the regulation of metabolism, reproduction, water balance, and many other functions.


What structure prevents food from entering the trachea when you swallow?


Which large blood vessel is the first to receive most recently eaten nutrients, transporting them to the liver?

Portal vein

After digestion and absorption, which circulatory system carries fat and fat-soluble vitamins?


Where does digestion begin?


Most digestion takes place in the

Small intestine

What substance helps suspend fat in a watery digestive mixture, making fat more available to digestive enzymes?


Where are most digestive enzymes produced?

Pancreas and small intestine

The villi of the small intestine

provide an enormous surface area that facilitates absorption.

What are on the villi to help increase absorption?


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