12. How is the small intestine designed to assimilate the food? explain.
13. How are fats digested? Where do they get digested?
Answers
Answer:
12. The small intestine is the longest organ of the digestive tract. The small intestine has millions of tiny finger-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 digested food and carry it to the bloodstream. From the bloodstream, the absorbed food is delivered to each and every cell of the body.
The digested food is absorbed into the blood in the human body by the small intestine. The digested food passes through the walls of the small intestine and then into our bloodstream. Here the digested food is broken down into vitamins, minerals, proteins, carbohydrates and fats. These all nutrients are reached to different cells and tissues by means of blood.
13. Fats are substances that help the body use some vitamins and keep the skin healthy. Bile juice secreted by liver emusifies large globules into small fat globules by a process called emulsification. Lipase of pancreatic juice breaks down small fat globules. The enzymes present in intestinal juice breaks down fats into fatty acids and glycerol. The process of digestion of fats takes place in small intestine.
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