verenkiertojärjestelmille
Verenkiertojärjestelmille, often translated as circulatory system, is a vital biological network responsible for transporting blood throughout an organism. This complex system includes the heart, blood vessels, and blood itself. The heart, a muscular organ, acts as a pump, continuously circulating blood. Blood vessels, comprising arteries, veins, and capillaries, form a vast network that reaches all parts of the body. Arteries carry oxygenated blood away from the heart, while veins return deoxygenated blood to the heart. Capillaries are tiny vessels where the exchange of oxygen, nutrients, and waste products occurs between the blood and the body's tissues.
The primary function of the circulatory system is to deliver oxygen and nutrients to cells and to