verenkiertovirtauksesta

Verenkiertovirtauksesta refers to the movement of blood through the circulatory system of an organism. This vital process is responsible for transporting oxygen, nutrients, hormones, and immune cells to all tissues and organs, while simultaneously removing waste products such as carbon dioxide. The circulatory system is broadly divided into two main circuits: the pulmonary circulation, which carries blood between the heart and the lungs for gas exchange, and the systemic circulation, which distributes oxygenated blood from the heart to the rest of the body and returns deoxygenated blood back to the heart.

The driving force behind this flow is the heart, a muscular organ that acts as a pump. It contracts rhythmically, propelling blood through a network of vessels. Arteries carry blood away from the heart, typically oxygenated blood, and branch into smaller arterioles. These then lead to capillaries, the smallest blood vessels, where the exchange of substances with tissues occurs. Deoxygenated blood returns from the capillaries to venules, which merge into larger veins, ultimately leading back to the heart. The pressure and resistance within these vessels, along with the pumping action of the heart, determine the rate and volume of blood flow. Various factors, including blood viscosity, vessel diameter, and physiological conditions, can influence the overall verenkiertovirtauksesta.