Verenkierosta

Verenkierosta, often translated as "circulation" in English, refers to the movement of blood throughout the body. This continuous process is vital for delivering oxygen and nutrients to tissues and organs and removing waste products. The human circulatory system is composed of the heart, blood vessels, and blood. The heart acts as a pump, propelling blood through a network of arteries, veins, and capillaries. Arteries carry oxygenated blood away from the heart, branching into smaller arterioles and then into even smaller capillaries, where the exchange of gases and nutrients with cells occurs. Deoxygenated blood is then collected by venules, which merge into larger veins that return the blood to the heart. This cycle ensures that every part of the body receives the necessary resources to function and that waste materials are efficiently removed. The circulatory system plays a crucial role in maintaining homeostasis, regulating body temperature, and transporting hormones. Blood itself is a complex fluid containing red blood cells, white blood cells, platelets, and plasma, each with specific functions in oxygen transport, immunity, clotting, and nutrient delivery.