kiertojärjestelmällä
Kiertojärjestelmällä, often translated as "circulatory system," refers to the biological system responsible for transporting nutrients, oxygen, hormones, and other essential substances throughout an organism's body. It also plays a crucial role in removing waste products like carbon dioxide. In vertebrates, the circulatory system is a closed loop, meaning the blood is always contained within a network of blood vessels. The central component of this system is the heart, a muscular organ that pumps blood.
The circulatory system consists of three main parts: the heart, blood vessels, and blood. The heart acts