Proteins
Sugar
Fats
Amino acids
5. What are villi? What is their location and functio
6. Where is the bile produced? Which component of
digest?
7. Name the type of carbohydrate that can be dige
not by humans. Give the reason also.
8. Why do we get instant energy from glucose?
9. Which part of the digestive canal is involved
(1) absorption of food molar
(11) chewing of food
inscissor
nine
Answers
Answer:
5) Small finger-like projections found in our small intestine are known as villi. The function of the villi is to increase the surface area of the intestine so as to increase its capacity to absorb nutrients and liquid from food passing through it.
6)Bile is produced by liver and stored in gall bladder. It helps in digestion of fats.
7) Cellulose is a type of carbohydrate that can be digested by ruminants and not by humans.
Ruminants have a large sac-like structure called rumen between the oesophagus and the small intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humans.
8)Glucose is a simple sugar and is easily absorbed by the body into the blood hence gives instant energy. ... As glucose can be easily absorbed in blood, it provides energy to the body. Hence, when glucose is directly taken, it does not have to be digested and thus acts as an instant source of energy.
9)The small intestine is the part of the intestines where 90% of the digestion and absorption of food occurs, the other 10% taking place in the stomach and large intestine. The main function of the small intestine is the absorption of nutrients and minerals from food.
(i) absorption of food – small intestine.
(ii) chewing of food – buccal cavity