Which are the major parts of the circulatory system?

The major parts of the circulatory system consist of the heart, blood vessels (which include arteries, veins, and capillaries), and blood. The heart serves as the central pump that drives blood throughout the body, delivering oxygen and nutrients to tissues while facilitating the removal of waste products like carbon dioxide. Blood vessels are the conduits through which the blood flows, each type playing a crucial role: arteries carry blood away from the heart, veins bring it back, and capillaries facilitate the exchange of substances at the tissue level. Blood itself is the medium that transports oxygen, nutrients, hormones, and waste products, making it a vital component of the system. Together, these elements form a cohesive unit that is essential for maintaining homeostasis and supporting life functions.