The Circulatory System by: bree

The circulatory system, (also called the cardiovascular system or the vascular system) is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintaining homeostasis

Homeostasis can be defined as the stable state of an organism and of its internal environment; as the maintenance or regulation of the stable condition, or its equilibrium; or simply as the balance of bodily functions.

The human circulatory system (simplified) The human circulatory system (simplified). Red indicates oxygen blood carried in arteries, blue indicates deoxygenated blood carried in veins. Capillaries, which join the arteries and veins, and the lymphatic vessels are not shown. The circulatory system includes the lymphatic system, which circulates lymph. The passage of lymph for example takes much longer than that of blood.

Blood is a fluid consisting of plasma, red blood cells, white blood cells, and platelets. Platelets, also called thrombocytes are a component of blood whose function (among with the coagulation factors) is to stop bleeding by clumping and clotting blood vessel injuries 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 (between cells) and returned to the lymphatic system. The cardiovascular system (from Latin words meaning "heart" and "vessel") comprises the blood, heart, and blood vessels. The lymph, lymph nodes, and lymph vessels form the lymphatic system, which returns filtered blood plasma from the interstitial fluid (between cells) as lymph.  

The circulatory system of the blood is seen as having two components, a systemic circulation and a pulmonary circulation. While humans, as well as other vertebrates, have a closed cardiovascular system (meaning the blood never leaves the network of the arteries, veins and capillaries), some invertebrate groups have an open cardiovascular system, on the other hand, is an open system providing an accessory route for excess interstitial fluid to be returned to the blood.

The more primitive, diploblastic animal phyla lack circulatory systems The more primitive, diploblastic animal phyla lack circulatory systems. Many diseases affect the circulatory system. This includes cardiovascular disease, affecting the cardiovascular system, and lymphatic disease affecting the lymphatic system the Lymphatic system is the network of vessels through what lymph drains from the tissues into the blood.

Cardiologists are medical professionals which specialize in the heart, and cardio. Thoracic surgeons specialize in operating on the heart and its surrounding areas. Vascular surgeons focus on other parts of the circulatory system.

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