CIRCULATORYSWAGGWAGONS

The circulatory system is an organ system that passes nutrients, gases, hormones, blood cells, to and from cells in the body to help fight disease, stabilize body temperature, and helps maintain homeostasis. The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. The main parts of the system are the heart, arteries, capillaries and veins. This system may be seen strictly as a blood distribution network, but some consider the circulatory system as composed of the cardiovascular system, which distributes blood, and the lymphatic system which returns excess filtered blood plasma from the interstitial fluid between cells While humans, as well as other vertebrae have a closed cardiovascular system (meaning that the blood never leaves the network arteries, veins, and capillaries), some in-vertebrae groups have an open cardiovascular system. The most primitive animal phyla lack circulatory systems. The lymphatic system, on..