Question

(a) How is small intestine designed to absorb the digested food efficiently?
(b) What would be the consequences of a deficiency of haemoglobin in our bodies?
​(c) Why should the forests and wildlife be conserved?

Answer 1

(a) Absorption of food refers to the process of absorption of nutrients derived from the breakdown of food through digestion into the blood. It takes place in small intestine.
The inner walls of the small intestine have thousands of finger-like projections called villi. These structures increase the surface area for absorption of the digested food. Villi contain a network of blood vessels inside the small intestine. The substances absorbed by the villi enter blood vessels and are transported to different organs of the body.

(b) Haemoglobin is present in the red blood cells and transports oxygen to the body cells. Deficiency of haemoglobin in the human body can lead to the deficiency of oxygen in the blood. It can also lead to anaemia.

(c) It is important to conserve the forests and wildlife because they have an important role in maintaining the ecological balance.