The Blood Vessels are the tubes through which the blood that pumps the heart is transported. There are three types of vessels, arteries, veins and capillaries. The blood vessels in different types are distributed throughout the body of animals, each artery carries blood is needed for the organs while veins are those that return the blood flow from the organs to the heart, In addition to a special function, capillaries are communicating vessels with a specific function.
The arteries have a very great burden of responsibility with respect to the functions that the heart exerts on them. Oxygenated blood loaded with nutrients that each organ needs for its operation is transported through the arteries, the advanced blood rich in caloric and nutritious content is also completed with the contribution that the lungs receive of carbon dioxide through them. The arteries are the blood vessels that support the most pressure, their thick walls of these are designed to support large torrents of a dense flow of blood whose appearance is strong red or watery, but these through the nervous system allow them to contract andbe dilated to establish control parameters between arterial and rhythmic pressure.
The veins lead the blood that goes back, to put it one way, because through these the blood that leaves the organs is directed to the heart. The veins are also the tubes through which the blood with carbon dioxide and oxygenated (from the outside) passes to the heart, the blood that passes through the veins is not returned, since they have one-way valves that contract when perceiving the more minimal and slight change of torrent direction. The blood (in a certain way more manipulated and impure) from the veins has a darker color tone.
Los Capilares son tuberías sanguíneas con paredes muy delgadas, las cuales irrigan el tono de la piel y comunican las arterias y las venas. También existe otro tipo de vasos sanguíneos que se derivan o son raíces de las venas, las vénulas, son las encargadas de reciclar la sangre sale a través de los capilares.
