Final answer:
The cardiovascular system consists of the heart, blood vessels, and blood, responsible for transporting essential substances throughout the body.
Explanation:
The main components of the cardiovascular system are the heart, blood vessels, and blood. The heart pumps blood, which travels through the blood vessels including arteries, veins, and capillaries, facilitating the transport of nutrients, hormones, gases, and wastes to and from body cells.
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