The three main functions of the cardiovascular system are to transport substances, control body temperature, and oxygenate the blood. The correct option is A.
What is the cardiovascular system?
The cardiovascular system is another name for the circulatory system. It pumps blood from the heart to the lungs and from the lungs to the arteries. The oxygenated blood is carried by the arteries to the body, and the deoxygenated blood is carried by the vein to the heart.
The main parts of the cardiovascular system are arteries, veins, capillaries, heart, and blood.
The circulatory system circulates and transports the substance with the blood. It provides blood and oxygen to the body and controls the temperature of the body.
Thus, the correct option is A. Oxygenate the blood.
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