It helps give you energy and it keeps you activated and moving you muscles
Answer:
the deoxcenated blood is ejected out of the body
Secondary consumers eat primary consumers, which eat producers. If the population of secondary consumers should increase, the population of primary consumers will decrease, and that means less producers are eaten, thus there will be more producers.
the body has levels of organisms that built on each other cells make up tissues, tissues make up organs, and organs make up organs system the function of an organs system
depends on the the integrated activity of it organs for instance digestive system organs corporate to process food
