The main reason why carbon atoms are so common in living things is because carbon is a very adaptable element in the sense that its electron configuration allows it to bond with many other atoms.
As you move down a group, atomic radius increases
It explodes
hope this helps lol
The respiratory and circulatory systems are close together by working and relying with each other. The respiratory system imports oxygen from the air and that oxygen goes through out the body by the circulatory system pumping the oxygen. That creates carbon dioxide, which the respiratory exports from the body.
