Review of Medical Physiology , 19th edition. Functions Mouth 32 Teeth 3 Pairs salivary glands Tongue Food chewed to break it up Salivary gland enzymes begin digestion of starch.
Some substances dissolve in salivary fluid.
Stomach Has glands that secrete HCl and enzymes. Sphincters at both ends. HCl and pepsin begin digestion of proteins. Small Intestine Duodenum Jejunum Ileum Sphincters at both ends 6 meters long Digestion of all types of macromolecules, using pancreatic enzymes. Absorption of most of the building block molecules.