*EXTRA PTS* what is a fat-soluble, wax like, colorless liquid found in animals but not in plants, used to produce substances the body needs, such as cell membranes?

Cholesterol

Explanation:

A fat-soluble, wax like, colourless liquid found in animals but not plants. The answer is Cholesterol.

the last statement is correct i.e.

when your heart is not pumping enough blood around your body because your heart is severely failing, you may need an artificial heart. an artificial heart is a mechanical device, about the size of an orange, that is connected to your heart or implanted in your chest to or replace a failing heart.