ANSC 1001 Lecture 11: Nutrition
Document Summary
Mouth, esophagus, stomach, small intestine (duodenum, jejunum, ileum), cecum (different because it is a dead end), large intestine. In the mouth, particle size decreases as a result of chewing, and saliva has enzymes that break down nutrients and bicarbonate which acts as a buffer to neutralize the stomach. Saliva also acts as a lubricant and a solvent to disperse and begin the digestion of any food that you put in your mouth. Mucus in esophagus acts as a lubricant for getting food down throat. Peristalsis the involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wavelike movements that push the contents of the canal forward. Chemical digestion occurs in the stomach from acids such as hydrochloric acid (denatures proteins, kills bacteria) and enzymes that will begin to degrade large proteins into peptides or amino acids. In the small intestine, digestion occurs in the duodenum with enzymes and bile or fat.
