More than 200 different types of cells exist in the human body. Why do you think these cells are important for various body functions?

the answer is "a.) well–developed vascular system."

explanation:

it depends on how much it could carry.

well, since there is no answer choices, i will give an answer on how it works : )

the two objects are placed together. energy will always be transferred from the hotter object to the cooler object until they are equal. hope this is close to one of the answer choices : )