Question

give reason
a) so as to why do humans need chambered heart
b) so as to why arteries are thick walled
c) so as to why veins have valves​

Answer 1

Answer:

1. Human heart has 4 Chambers to avoid the mixing of oxygenated and deoxygenated blood.. It is helpful in the organisms that have high energy needs which constantly use energy to maintain thir body temperature
2. The flow of blood in arteries is high...... That's why arteries have thick walls
3. The flow of blood in veins is very slow... As the flow is slow.. There r chances for the back flow of the blood.. Hence to avoid the backflow of the blood veins have valves