Circulatory system
The
circulatory system also called the
cardiovascular system, is an organ system that permits blood to circulate and transport nutrients, oxygen, carbon dioxide, hormones, and blood cells to and from cells in the body to nourish it and help to fight diseases, stabilize body temperature and pH, and to maintain homeostasis. The circulatory system is often seen to be composed of both the
cardiovascular system, which distributes blood, and the
lymphatic system, which circulates lymph.These are two separate systems. The passage of lymph for example takes a lot longer than that of blood. Blood is a fluid consisting of plasma, red blood cells, white blood cells, and platelets that is circulated by the heart through the vertebrate vascular system, carrying oxygen and nutrients to and waste materials away from all body tissues. Lymph is essentially recycled excess blood plasma after it has been filtered from the interstitial fluid and returned to the lymphatic system. The cardiovascular system comprises the blood, heart, and blood vessels.