Answer: The heart
Explantion in details: The heart is a muscular organ that can be found in most animals, it pumps blood through the blood vessels of the circulatory system.Blood provides the body with your oxygen and your nutrients, as well as helping in the removal of metabolic wastes. In humans, the heart is located between the lungs, in the middle compartment of the chest. Without the heart we will die within seconds because all blood is no loger being pumped out of it :)
I hope this helps a thank and a brainlist would be greatly appreciated :))
