State the role of the following in human digestive system: (a) Digestive enzymes (b) Hydrochloric acid (Hcl) (c) Villi
Answers
Answer:
Explanation:
The digestive enzymes help to convert the food into its simplest form like amaylase, etc. The hydrochloric acid is present in the stomach and helps to further breakdown the proteins and kills the bacteria. The villi are tiny finger like structures present inside the small intestine and help in increasing the surface area of the small intestine and help in absorption. They help in transferring the nutrients into the blood stream but do not digest the nutrients.
Hope my answer helped you!!
Answer:
================================================================
(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.
===================================================================