What system controls the circulation of blood and lymph throughout the body?

The circulatory system is the primary system responsible for the circulation of blood and lymph throughout the body. It consists of the heart, blood vessels, and lymphatic vessels that work together to transport oxygen, nutrients, hormones, and waste products to and from cells. Blood circulation ensures that essential substances are delivered to tissues and organs, while lymph circulation plays a crucial role in the immune response and the maintenance of fluid balance in the body.

In contrast, the respiratory system is responsible for the exchange of gases, primarily oxygen and carbon dioxide, but does not control blood or lymph circulation. The nervous system is involved in transmitting signals throughout the body to coordinate functions but does not directly manage blood circulation. The endocrine system primarily regulates bodily functions through hormones, which can influence circulation indirectly, but it does not control the actual movement of blood or lymph. Thus, the circulatory system is the key player in managing blood and lymph circulation.