1 / 6

Mastering Digestive Absorption Mechanism in the Small Intestine

Learn about peristalsis, bile, digestive enzymes, and microvilli in the small intestine that aid in absorption of digested food efficiently. The structure of a villus and microvilli enhances absorption by providing a large surface area for quicker nutrient uptake into the bloodstream.

shirin
Download Presentation

Mastering Digestive Absorption Mechanism in the Small Intestine

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. e. Nutrition We still need to learn: • Peristalsis • What bile is • Digestive enzymes • All about the microvilli

  2. 2.31 Explain how the structure of a villus helps absorption of the products of digestion in the small intestine. • The small intestine is adapted for absorbing digested food very efficiently. • It is very long (about 7m in adults), which allows a long time for the food to be digested and absorbed as it moves through the gut. • The wall of the small intestine is covered in villi. • Each villi is covered with cells which have even smaller projections on them called, microvilli.

  3. Microvilli • Microvilli give the inner surface of the small intestine a very large surface area. • This large surface area means that the food can be absorbed quicker. • Digested food is absorbed into the blood stream and then taken to the liver before it goes to the rest of the body. • These villi contain lots of blood vessels.

  4. Villi • Villi have walls that are only one cell thick. • This allows the food to cross the wall easily and quickly to the blood capillaries. • Each villi is 1mm long. • The cells that cover the villi make enzymes. • These enzymes complete the digestion of food.

  5. Villi contain lacteals. • Lacteals are part of the lymphatic system. • Fats are absorbed into the lacteals. • Villi also contain goblet cells. • Goblet cells make mucus.

More Related