Which organ system is primarily responsible for transporting nutrients, gases, and wastes through the body?

Which organ system is primarily responsible for transporting nutrients, gases, and wastes through the body?

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

Answer: (B)

The circulatory system is responsible for moving nutrients, gases, and wastes throughout the body. The heart pumps blood through a vast network of vessels, delivering nutrients absorbed from the digestive tract to every cell. It also carries oxygen from the lungs to tissues and returns carbon dioxide and other waste products to organs like the lungs, liver, and kidneys for elimination. Other systems provide the substances to be transported—nutrients come from digestion, and gases are exchanged in the lungs—but the actual distribution network that carries them everywhere is the circulatory system.

The circulatory system is responsible for moving nutrients, gases, and wastes throughout the body. The heart pumps blood through a vast network of vessels, delivering nutrients absorbed from the digestive tract to every cell. It also carries oxygen from the lungs to tissues and returns carbon dioxide and other waste products to organs like the lungs, liver, and kidneys for elimination. Other systems provide the substances to be transported—nutrients come from digestion, and gases are exchanged in the lungs—but the actual distribution network that carries them everywhere is the circulatory system.