Question

Guys plz help,and plz answer all of them otherwise don't answer...three Of them are there...

Answer 1

1)The small intestine has millions of tinyfinger-like projections called villi. These villi increase the surface area for more efficient food absorption. Within these villi, many blood vessels are present that absorb the digestedfood and carry it to the blood stream.

2)The gastric chief cells of the stomach secrete enzymes for protein breakdown (inactive pepsinogen, and in infancy rennin). Hydrochloric acid activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis.

3)The following raw materials arerequired for photosynthesis: The raw material CO2 enters from the atmosphere through stomata. Water is absorbed from the soil by the plantroots. Sunlight, an important component to manufacture food, is absorbed by the chlorophyll and other green parts of the plants.

Answer 2

what is the role of acid in our stomach?
Answer : The gastric chief cells of the stomachsecrete enzymes for protein breakdown (inactive pepsinogen, and in infancy rennin). Hydrochloric acidactivates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking aminoacids, a process known as proteolysis.The gastric chief cells of the stomachsecrete enzymes for protein breakdown (inactive pepsinogen, and in infancy rennin). Hydrochloric acidactivates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking aminoacids, a process known as proteolysis.