Question

Q1) Define Digestion
Q2) Why do arteries have thicker and stronger walls as compared to veins?

Answer 1

1. Digestion is the process of breaking down of food for utilization.
2. Arteries receive the blood from heart. As heart pumps, the blood goes I to arteries with higher pressure. So, to withstand this high pressure, arteries have thicker and stronger walls. On the other hand, veins recieve blood from organs, so there is not much pressure. So, veins have comparatively thinner and weaker walls.

Answer 2

Q.1 ) The process in which all the organic substances eaten are broken down into simpler inorganic water soluble substances by chemical,biological and physical processes is known as digestion.

Q.2 ) Arteries have thicker walls than the veins because the blood carried by the arteries from the heart to the body parts is at a high pressure and high velocity than the blood carried by veins which is at a low pressure.