Question

state the role of the following human digestive system digestive enzymes ,hydrochloric acid, villia

Answer 1

Hydrochloric acid kills harmful bacteria enter in our stomach along with food. It inactivates salvaray amaylaze. Prevents fermentation of food.

villi which increase the surface area of the intestine and contain specialized cells that transport substances into the bloodstream. 

Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. help in the breaking down of complex food particles into simple ones.

Answer 2

Answer:

Here is your answer :)

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(i) Digestive enzymes – Foods need to be broken into their small or simpler

molecules so that they can be absorbed into the bloodstream. However, the physical breakdown of food is not enough. Enzymes are hence needed for the chemical breakdown of food and speeding up the digestive process. The products of digestion can hence be small enough to be absorbed.

(ii) Hydrochloric acid – Hydro chloric acid helps to kill the germs which might have entered in to the system through food. It creates acidic medium for the pepsin to act on food to breakdown proteins.

(iii) Villi – Villi are finger like projections in the small intestine. They help to increase the surface area for absorption of the digested food. Villi are richly supplied with blood vessel which help to absorb digested food in to the blood stream.

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