Mouth: Where the food enters. Food has to enter somewhere before they can be digested right? There are other purposes of your mouth that isn’t biology related, and hence we won’t discuss it here.
Salivary Glands: These secrete amylase, which breaks down starch into maltose, so the substance can more easily be digested.
Esophagus & Stomach: : After the food has been digested, it is now in a round, small mass. It then travels down the esophagus and the stomach by a process called Peristalsis. Gastric juice in the stomach will then start digesting the protein.
Small intestines: After 1-2 hours a resulting thick liquid called chyme is produced. The chyme enters the duodenum, and is mixed with digestive enzymes in the pancreas. Eventually, this is passed down the small intestines.
Chyme is absorbed into blood when digested.
Water and minerals are reabsorbed into the blood in the colon.
Liver: The liver produces bile, which emulsifies (mixture of two or more liquids) fats, to allow absorption. Bile is stored in the gallbladder where it is then released to small intestine via bile duct.
Pancreas: Pancreas makes pancreatic juice. This secretes important enzymes for digestion such as amylase, pancreatic lipase, and forms of proteases.
Anus: Stored feces are eliminated from the body through the anus, via the process egestion.

	Created by ShreyaDas over 10 years ago

IGCSE Biology Note on Animal Nutrition, created by ShreyaDas on 01/07/2014.