The document discusses the structure and function of the small intestine and villi. The small intestine is coiled and folded within the abdominal cavity to enable complete digestion. It contains many finger-like projections called villi that increase the surface area for absorption. The villi contain blood vessels and lacteals that absorb nutrients from digested food and transport them to the bloodstream and lymph system.

1. WELCOME
ATHIRA RAJAN
NATURAL SCIENCE

3. DIGESTIVE SYSTEM
Mouth
Esophagus
Stomach
Liver
Gall bladder
Pancreas

4. Duodenum
Small Intestine
Large intestine
Rectum
Anus

5. Small Intestine

6. SMALL INTESTINE
Seen as many folds, twisted
and coiled within the abdominal
cavity, enabling complete
digestion of food.

7. SMALL INTESTINE C.S

8. VILLUS

9. VILLI
Present in the infoldings of
small intestine
40 to 50 villi are seen in each
square millimeter.

10. FUNCTIONS OF VILLI
Absorption of nutrients from
the small intestine.
Exchange of nutrients to blood
and lymph.

11. STRUCTURE OF VLLUS

12. COMPONENTS OF VILLUS
Branch of vein.
Branch of artery.
Capillaries that connects arteries and
veins.
Lacteal that branches from the lymph
vessels.