keskusverenkierron

Keskusverenkierron, which translates to central circulation in English, refers to the primary circulatory system responsible for transporting blood throughout the body. This system consists of the heart and blood vessels. The heart acts as a pump, rhythmically contracting to propel blood into arteries, which branch into smaller arterioles and finally capillaries. Capillaries are the smallest blood vessels where the exchange of oxygen, nutrients, and waste products occurs between the blood and body tissues. From the capillaries, blood flows into venules, which merge into larger veins, ultimately returning to the heart.

The central circulation is divided into two main circuits: the pulmonary circulation and the systemic circulation. Pulmonary circulation involves the flow of blood between the heart and the lungs. Deoxygenated blood is pumped from the right side of the heart to the lungs, where it releases carbon dioxide and picks up oxygen. Oxygenated blood then returns to the left side of the heart. Systemic circulation, on the other hand, carries oxygenated blood from the left side of the heart to the rest of the body's tissues and organs. After delivering oxygen and nutrients, deoxygenated blood returns to the right side of the heart, completing the cycle. This continuous flow ensures that all cells receive the necessary oxygen and nutrients and that metabolic waste products are removed efficiently.