state the role of digestive enzymes HCL acid and villi in human digestive system
Answers
hydrochloric acid is secreted by the sub mucosal epithelium of stomach and make the medium acidic for gastric enzyme action on the chyme it also activated pepsinogen into pepsin . villi is a finger like projection of mucosal epithelium of small intestine and increase the absorptive surface area of digested food.
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Explanation:
(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.Read more on Sarthaks.com - https://www.sarthaks.com/498516/state-the-role-the-following-human-digestive-system-digestive-enzymes-hydrochloric-acid