How do the kidney and heart work together?

Answer 1

The heart is the pump that pumps blood to the lungs where it exchanges its carbon dioxide for Oxygen. And then pumps the oxygenated blood round the body.

Your kidneys help cleanse the blood of unwanted liquid waste products such as Urea, which is produced in part by the metabolism of protein.

And the kidneys also help with the body's water balance, removing water from the bloodstream quite quickly when required.

When you get cold, blood is withdrawn from the extremities, and this increases the volume of blood in your core. Your kidneys will then remove some of the water from the bloodstream, and this is why, when you get cold, you need to have a pee.