Oral Cavity
- The saliva sticks chewed food into a bolus and starts to digest carbohydrates.
- The teeth reduce the size of the food so we can swallow the food with out choking.
- The saliva glands also lubricate the mouth to aide our our speech and swallowing.
Stomach
Thin, strongly acidic ( p H varying from 1 to 3), almost colorless liquid secreted by the glands in the lining of the stomach. Its essential constituents are the digestive enzymes pepsin and rennin (see rennet), hydrochloric acid, and mucus.
Stomach growling= https://www.youtube.com/watch?v=ZBKSMqEzIpE
Link to Peristalsis - https://www.youtube.com/watch?v=o18UycWRsaA
Stomach growling= https://www.youtube.com/watch?v=ZBKSMqEzIpE
Link to Peristalsis - https://www.youtube.com/watch?v=o18UycWRsaA
Gastric Juice components
Pepsin- Enzyme; digests proteins
Hydrochloric acid- Denatures proteins; decreases pH (for optimum pepsin function
Intrinsic factor -protects and allows later absorption of vitamin B12
Mucus -lubricates chyme; protects stomach lining
Water Dilutes food and other substances; facilitates mixing
Pepsin- Enzyme; digests proteins
Hydrochloric acid- Denatures proteins; decreases pH (for optimum pepsin function
Intrinsic factor -protects and allows later absorption of vitamin B12
Mucus -lubricates chyme; protects stomach lining
Water Dilutes food and other substances; facilitates mixing
Small intestine and Large intestine
The small intestine is the part of the intestines where 90% of the digestion and absorption of food occurs, the other 10% taking place in the stomach and large intestine. The main function of the small intestine is absorption of nutrients and minerals from food.
- Cause of diarrhea- The most common cause of diarrhea is a virus that infects the gut. The infection usually lasts for two days and is sometimes called intestinal flu or stomach flu.