Answer:
circulatory system
Explanation:
carries oxygen, water, and nutrients to cells throughout your body. Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin. Your nervous system controls all these activities with electrical impulses.
I have a question are you asking what are the molecules of a shark or something
True, depending on which isotope. some Isotopes are deemed extremely unstable and cannot be used for nuclear fuel. however, most are usable
