Final answer:
The circulatory system, also known as the cardiovascular system, transports oxygen, nutrients, hormones, heat, and waste materials throughout the body.
Step-by-step explanation:
The circulatory system, also known as the cardiovascular system, is responsible for transporting oxygen, nutrients, hormones, heat, and waste materials throughout the body. It consists of the heart, blood vessels, and blood. The heart pumps oxygen-rich blood to the body cells, while the blood vessels carry the blood and nutrients to the cells and remove waste materials like carbon dioxide.