1 / 7

Digestive System

Digestive System. The digestive system includes the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. It’s function is to convert food into usable substances for the body cells. Mouth. Teeth are use for cutting,tearing,and crushing food into small fragments.

urbana
Download Presentation

Digestive System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Digestive System • The digestive system includes the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. • It’s function is to convert food into usable substances for the body cells

  2. Mouth • Teeth are use for cutting,tearing,and crushing food into small fragments. • Saliva helps you make it easier to chew your food. • Amylase helps break the chemical bonds of starches and releases sugar. breakdown of carbohydrates into smaller molecules. This process is called chemical digestion. • Lysozyme helps fight infection by digesting the cell wall of many bacteria which may enter in your mouth with food.

  3. Esophagus • In the process of swallowing the tongue and throat muscles push the chewed clump of food called bolus. • The bolus passes through the esophagus or food tube into the stomach. • Peristalsis helps squeeze the food through the esophagus into the stomach. • Cardiac sphincter, a thick ring of muscle that’s closes the esophagus after food has passed into the stomach. • Heartburn can be caused of a stomach acid,overeating or drinking to many caffeinated drinks.

  4. Stomach • Food from the esophagus empties into a large muscle called the stomach. • Chemical Digestion the lining of the stomach contains millions of microscopic gastric glands. • The acid activates pepsin, an enzyme that begins the digestion of proteins. • In digestion, the muscles of the stomach mix the gastric fluids and food. This mixture is called chyme.

  5. Small Intestine • Small intestine Most of all the chemical digestion and absorption of food occurs in the small intestine. • Pancreas gland that serves two important functions for digestion. 1. Enzymes that break down carbohydrates, proteins, and lipids. 2. Pancreas also produce sodium bicarbonate, a base that neutralizes stomach acid. • Liver makes a fluid called Bile that helps digest lipids. • Gall Bladder- Stores Bile • Villi –the surface of the small intestine is covered with fingerlike projection which absorb digested food.

  6. Large Intestine • Large intestine is also called the colon. • Large intestine removes water from the undigested material. • Bacteria helps remove vitamins from undigested food.

  7. Rectum and Anus • Rectum stores waste material until the body is ready to remove it. • Anus the exit of the digestion system.

More Related