Which organ system transplants nutrients and oxygen to body cells and removes waste products?

Which organ system transplants nutrients and oxygen to body cells and removes waste products?

• A. The digestive system
• B. The circulatory (cardiovascular) system
• C. The respiratory system
• D. The excretory system

Answer: (B)

The circulatory system acts as the body's delivery and cleanup network, moving nutrients and oxygen to every cell and carrying waste products away. Nutrients absorbed from the digestive system enter the bloodstream, and oxygen from the lungs attaches to red blood cells to be transported through the bloodstream. Blood delivers these essentials to tissues via arteries and capillaries, where cells take up nutrients and oxygen and release wastes into the blood. The blood then returns to the heart and onward to the lungs or kidneys to be removed from the body. Other systems have related roles but don’t handle this combined transport and waste-removal function. The digestive system processes food and supplies nutrients, the respiratory system handles gas exchange, and the excretory system eliminates wastes from the body after they’ve circulated. The task described—transplanting nutrients and oxygen to cells and removing waste products—is the job of the circulatory system.

The circulatory system acts as the body's delivery and cleanup network, moving nutrients and oxygen to every cell and carrying waste products away. Nutrients absorbed from the digestive system enter the bloodstream, and oxygen from the lungs attaches to red blood cells to be transported through the bloodstream. Blood delivers these essentials to tissues via arteries and capillaries, where cells take up nutrients and oxygen and release wastes into the blood. The blood then returns to the heart and onward to the lungs or kidneys to be removed from the body.

Other systems have related roles but don’t handle this combined transport and waste-removal function. The digestive system processes food and supplies nutrients, the respiratory system handles gas exchange, and the excretory system eliminates wastes from the body after they’ve circulated. The task described—transplanting nutrients and oxygen to cells and removing waste products—is the job of the circulatory system.