BIO203H5 Lecture Notes - Rumen, Salivary Gland, Carbonic Anhydrase
Document Summary
Digestion is the breakdown of food into small enough pieces for absorption the uptake of nutrients. Digestion takes place in the digestive tract (figure 43. 5)-also known as the alimentary canal or gastrointestinal tract (gi), beginning in the mouth and ending in the anus. Figure 43. 6 summarizes the chemical changes that occur as food moves through the digestive tract. Digestion of material inside tract allows animals to feed on large pieces of food. Different chemical and physical processes can be separated within digestive tract, so that they occur independently of each other and in a sequence. Tubelike digestive tract provides one way flow and aloows wastes to exit body through anus. Several vital organs and glands connected to digestive tract. These structures contribute digestive enzymes and other products to specific portions of tract. Digestion begins with tearing and crushing of teeth. Chewing reduces size of food and softens them.
