a)Differentiate between absorption and assimilation.
b)What are villi? State its location and functions.
c)State the role of salivary glands in digestion.
Answers
Answer:
a)Absorption is absorbing simple molecules, which were produced after the process of digestion into the body from the intestinal cavity. Assimilation is the process of reaching the nutrients till the each and every cell.
b)The tiny projections on the inner surface of the small intestine which help in absorbing the digested food are called villi. These helps to increase the surface area of intestinal walls.
Location
These are located in the inner walls of the small intestine.
Functions
Their function is to increase the surface area of the small intestinal wall for absorption of the digested food.
These projections absorb the protein and help in the transfer of the proteins to all cells and tissues.
Many blood vessels are present within these villi, that help in the absorption of digested food and carry it to the bloodstream. Later, from the bloodstream, the absorbed food is delivered to each and every cell of the body.
c)The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist.it also breaks carbohydrates into glucose,proteins into amino acid and fats into fatty acid .
Explanation:
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