Which term describes the network moving blood through the body?

• A. Hyperventilation
• B. Hypoxia
• C. Capillary
• D. Circulatory System

Answer: (D)

Movement of blood through the body is carried out by the circulatory system. This network, consisting of the heart, blood vessels, and blood, functions to transport oxygen and nutrients to tissues, remove wastes, and help regulate temperature and pH. The question asks for the term describing the network that moves blood, so the circulatory system is the best fit.

Hyperventilation describes abnormally rapid or deep breathing, which affects gas exchange but not the network that moves blood. Hypoxia refers to insufficient oxygen reaching tissues, a condition that can arise from problems in circulation but isn’t the name of the system itself. A capillary is a tiny vessel within the circulatory system, not the entire network.