Which term refers to the body's network including the heart, arteries, veins, and capillaries that pumps blood?

• A. Color Vision
• B. Circulatory System
• C. Command Presence
• D. Complex Motor Skills

Answer: (B)

The circulatory system is the body’s network that pumps blood through the heart, arteries, veins, and capillaries. The heart acts as the muscular pump that pushes blood into arteries, which carry it away to tissues; capillaries are the tiny vessels where oxygen, carbon dioxide, nutrients, and wastes are exchanged with cells; and veins bring blood back to the heart to complete the circuit. This system keeps blood moving to supply energy and remove wastes, central to sustaining life and bodily function. Color vision involves the eyes and retina, command presence relates to social leadership, and complex motor skills involve coordinated movements—none describe the blood-pumping network.