Answer :

Final answer:

The cardiovascular system consists of the heart, blood vessels, and blood, responsible for transporting substances and oxygenating blood. Pulmonary and systemic circulations play crucial roles in blood flow throughout the body.


Explanation:

The major components of the cardiovascular system: the heart, blood vessels, and blood.

The functions of the cardiovascular system include transporting needed substances like oxygen and nutrients to the body's cells and picking up waste products.

Understanding how blood is oxygenated through pulmonary circulation, which moves blood between the heart and lungs, and how it circulates throughout the body via systemic circulation, is essential.


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