Nikolas
Created page with "== Circulatory system == The circulatory system is divided into many different parts. The systemic circulation is the one which supplies all tissues of the body with oxygenated blood and nutrients. The vast majority of blood is in the systemic circulation. The systemic circulation begins at the aorta and ends at the superior and inferior vena cavae. It has an arterial and a venous side, where the arterial side contains oxygen-and-nutrient-rich blood and the venous side c..."