How deos the heart support the human life let me know the important kidney; brain explaain how blood?

is circulated in the system let me know the important of the whiteblood cell;redblood cell to the human body

To put it as simply as I can think of: The red blood cells supply food, water, and oxygen to the various organs in the body. They also take away all the waste products from the organs. The kidneys filters the red blood cells and takes the waste products away from the body to be excreted away at a later time. The heart pumps the blood around the body where it needs to be at. The lungs supply the oxygen needed for the body. The small intestines supply the food and water needed for the body. The white blood cells act as a protection system for the body. When the body is attacked by an invator such as bacteria the white blood cells "beef up" its numbers in the body, surrounds the invator and attacks. The wastes from this "battle" is then taken away and ends up eventually in the kidneys to be excreted later. There are also what is called platelets in the human blood that acts as a healing system to repair any damage made by the "battles" that the white blood cells endures. The brain acts as "central command" ensuring each system in the body and each organ is functioning as best as it can. The heart since it does act as a pump if it stops will cause the organs to fail and the body to stop functioning. Same as if the lungs stop the body will not get the oxygen it needs to function.

You need to sit down with a GOOD doctor and discuss this in detail with the doctor. You are not going to make repairs yourself. Are you?