Which system is primarily responsible for carrying blood to the cells?

Which system is primarily responsible for carrying blood to the cells?

• A. Digestive
• B. Circulatory
• C. Nervous
• D. Muscular

Answer: (B)

The circulatory system is responsible for carrying blood to the cells. It includes the heart, which acts as the pump, and the network of blood vessels that transport blood throughout the body. Arteries move oxygen-rich blood away from the heart, capillaries are the sites where oxygen and nutrients are exchanged with cells, and veins return blood back to the heart. This delivery of oxygen and nutrients and removal of wastes is called perfusion, and it’s essential for cell survival. The other systems don’t move blood through the body: the digestive system processes and absorbs nutrients, the nervous system regulates and coordinates bodily functions (including heart rate), and the muscular system enables movement but isn’t the main pathway for circulating blood.

The circulatory system is responsible for carrying blood to the cells. It includes the heart, which acts as the pump, and the network of blood vessels that transport blood throughout the body. Arteries move oxygen-rich blood away from the heart, capillaries are the sites where oxygen and nutrients are exchanged with cells, and veins return blood back to the heart. This delivery of oxygen and nutrients and removal of wastes is called perfusion, and it’s essential for cell survival. The other systems don’t move blood through the body: the digestive system processes and absorbs nutrients, the nervous system regulates and coordinates bodily functions (including heart rate), and the muscular system enables movement but isn’t the main pathway for circulating blood.