Which term is used to denote the body system that circulates blood and lymph through the body?

• A. Circulation
• B. Endocrine system
• C. Circulatory system
• D. Lymphatic system

Answer: (C)

Fluid movement throughout the body is achieved by a network driven by the heart and vessels that transport essential substances and waste. This transport system is called the circulatory system. It primarily moves blood through the heart and blood vessels, delivering oxygen and nutrients and removing wastes. The lymphatic vessels, which carry lymph, support immune function and fluid balance, but the term that names the overall system responsible for circulating both blood and lymph is the circulatory system. The other terms describe different concepts: circulation refers to the process of moving blood, the endocrine system governs hormones, and the lymphatic system focuses on lymph and immunity without describing the blood-circulating network.