class 7 digestive system ppt.pptx digestion

digestion ingestion

1. BUCCAL CAVITY

2. FUNCTIONS OF TONGUE

3. ESOPHAGUS The esophagus is a muscular tube that connects the mouth to the stomach . It moves food from the mouth to the stomach through a series of muscular contractions called peristalsis .

4. FUNCTIONS OF STOMACH   Store and digest the food  .   Produces hydrochloric acid and enzymes to help digest food. Acidic environment kills bacteria. The digested food is called chyme .

5. Functions of Small Intestine

6. Secretion of liver-BILE SALTS

7. SECRETION OF PANCREAS Release pancreatic juice D igest fats, carbohydrates and proteins Regulates blood sugar by producing insulin.

8. Function of Villi

9. FUNCTIONS OF VILLI TINY FINGER LIKE Increase The surface area INCREASE THE ABSORPTION INNER LINING OF SMALL INTESTINE

10. FUNCTIONS OF LARGE INTESTINE No digestion Absorb water and vitamins. Leftover waste is stored at the end called the RECTUM.

11. FUN ACTIVITY Students need to choose any food you wish. Imagine that the food has feelings. Explain all that in your comic strip.