Question

1. What are villi? Mention its function.
3. What is Peristalsis?
4. Describe oesophagus.




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Answer 1

Explanation:

1)-> Villi are small finger-like projections located in the walls of the small intestine. Their function is to increase the surface area in order to maximise the absorption of digested food. ... Each villus consists of arteries, veins, a complex capillary system and a lymphatic vessel called lacteal.

2)-> Peristalsis is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an anterograde direction. Peristalsis is progression of coordinated contraction of involuntary circular muscles, which is preceded by a simultaneous contraction of the longitudinal muscle and relaxation of the circular muscle in the lining of the gut.

2)->The oesophagus is a muscular tube. It connects your mouth to your stomach. When you swallow food, the walls of the oesophagus squeeze together (contract). This moves the food down the oesophagus to the stomach. The upper part of the oesophagus is behind the windpipe (trachea). I hope it helps you

Answer 2

• Villi are microscopic projections on the small intestine's inner surface that aid in the absorption of digested food.
• This aids in the expansion of the surface area of the intestine walls.
• These can be found in the small intestine's inner walls.
• Their purpose is to expand the surface area of the small intestine wall so that the digested food may be absorbed more easily.
• Protein molecules are absorbed by these projections, which aid in protein transport to all cells and organs.
• Within these villi, there are many blood arteries that aid in the absorption and transport of digested food to the circulation.
• The absorbed meal is then supplied to every cell in the body via the circulation.