Which system includes the heart, blood vessels, and blood?

The cardiovascular system is responsible for transporting blood throughout the body, which is essential for delivering oxygen and nutrients to tissues and removing waste products. This system is composed of the heart, which acts as a pump, blood vessels that serve as conduits for blood flow, and the blood itself, which carries the vital substances.

The heart is a muscular organ that works continuously to maintain circulation, while blood vessels include arteries, veins, and capillaries, each playing a specific role in the circulation process. The cardiovascular system is crucial not only for sustaining life through nutrient and oxygen delivery but also for regulating body temperature, pH levels, and fluid balance, making it fundamental to overall health.