why is the heart suited to its funtion and why is the respiratory system suited to its function

Answer 1

Go back to those sites I gave you. What does the heart have that makes it the only thing that can do what it does?"

Answer 2

Isn't it amazing that where the heart is, two blood pumps are needed, one pump to pump blood through capillaries in the body, and another pump to move blood through a gas exchange system of capillaries.

What is more remarkable, the respiratory system seems to fit the need for a gas exchange system.

Answer 3

ive put about the pump and all that but i need more info on why its good at its job