Digestive System & Water, Salt, & Vitamins
Water and Salt
Most of the material absorbed from the cavity of the small intestine is water in which salt is dissolved. The salt and water come from the food and liquid we swallow and the juices secreted by the many digestive glands.
Vitamins
Another vital part of our food that is absorbed from the small intestine is the class of chemicals called vitamins. The two different types of vitamins are classified by the fluid in which they can be dissolved: water soluble vitamins – all the B vitamins and vitamin C – and fat soluble vitamins – vitamins A, D, and K.
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