Answer:
The main purpose of the double circulatory system in the human body is to ensure efficient transport of oxygenated blood from the lungs to the rest of the body and to facilitate the removal of carbon dioxide and other waste products from the body.
Step-by-step explanation:
The human circulatory system consists of two separate circulatory systems: the pulmonary circulation and the systemic circulation. In the pulmonary circulation, deoxygenated blood is transported from the heart to the lungs, where it is oxygenated and then returned to the heart. In the systemic circulation, oxygenated blood is transported from the heart to the rest of the body's tissues and organs, where it delivers oxygen and nutrients and removes waste products. The deoxygenated blood is then returned to the heart.
The double circulatory system is necessary because the pressure required to pump blood to the lungs for oxygenation is much lower than the pressure required to pump blood to the rest of the body's tissues and organs. The heart has two separate pumps: the right ventricle, which pumps blood to the lungs, and the left ventricle, which pumps blood to the rest of the body. The two pumps work in tandem to ensure that blood is efficiently circulated throughout the body.