Answer:
every cell in you body needs oxygen to help it metabolize it release from food for energy.cells that do the same job combines together to form body tissue such as muscles,skin bone tissue.cells can take in fuel.cells not only make up living things,they are living g things.
21 IS ANSWER PLZ GIVE BRAINLYIST I NEED TO LEVEL UP
If our eyes were sensitive only to x rays the world would appear dark because X-ray light does not reach Earth's surface.
White Blood cells Because they are produced in your body and they are constantly used more than they are replaced
