I think the power plant because the mitochondria makes the atp?
Epithelial tissues line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs. ... Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
Hoped this helped!
Water molecules would probably be it since they are in water and they are made up of two hydrogen and one oxygen.
Answer:
I believe the answer is c
Explanation:
