Leviämiselimistöä
Leviämiselimistöä, also known as the circulatory system or cardiovascular system, is a network of organs and vessels that transports blood throughout the body. This essential system is comprised of the heart, blood vessels (arteries, veins, and capillaries), and blood. The primary function of the circulatory system is to deliver oxygen, nutrients, hormones, and other vital substances to cells and tissues, while simultaneously removing carbon dioxide and metabolic waste products.
The heart, a muscular organ, acts as the central pump, rhythmically contracting to propel blood through the