Question

• What does the valves inside the heart do?
• Why do the walls of the heart differ in thickness ?
• Why do humans have four chambers ?​

Answer 1

Answer:

1.Valves inside the heart prevent the back blow of the blood. If the valves are absent then the whole circulatory system would collapse.

2.Walls Of the heart differ in thickness depending upon the pressure... for example, In Arteries blood flows with high pressure so its wall are thick n elastic..whereas in Veins blood flows with less pressure so its walls are thin and less eleastic as compared to arteries.

3. Humans are warm blooded animals..to maintain the body temperature and for proper oxygenation of cells double circulation is required.

Hope it helps you..

Answer 2

Answer:

1. valves are help to not to flow the blood in back ward direction

2. to protect from major disease

3. to supply the blood for to each cell in bady and to supply the blood to each cell in different directions