Which system is primarily concerned with transporting nutrients and oxygen to cells?

The circulatory system is primarily responsible for transporting nutrients and oxygen to cells throughout the body. This system includes the heart, blood vessels, and blood, which work together to circulate these vital substances. Oxygen is absorbed into the bloodstream through the lungs, and nutrients, such as glucose from the digestive system, are delivered to cells via the bloodstream. The efficient functioning of the circulatory system is crucial for maintaining cellular metabolism, supporting energy production, and ensuring overall health.

The digestive system plays a role in breaking down food into nutrients, but it does not transport them directly. The nervous system is involved in transmitting signals throughout the body and plays a key role in coordinating bodily functions but does not transport nutrients or oxygen. The respiratory system is essential for gas exchange, particularly oxygen intake and carbon dioxide removal, but it does not transport these gases; that function is performed by the circulatory system.