circulatory organs in the human body allow blood to perform all necessary functions.The essence of the circulation is the movement of blood through the vessels to provide all the necessary nutrients in human organs.All of the circulatory system is composed of blood vessels and heart.By reducing the heart muscle, blood spreads through the vessels.There are two types of vessels: arteries (carry blood from the heart muscle to organs and tissues) and veins that supply blood to the heart.Between them all vessels associated with tiny blood capillaries.
In humans distinguish following circulation: small, large.The trunk or large circle, originates in the left ventricle of the heart.The blood is then poured into the main artery in the human body - the aorta.From the aortic blood spreads along the spine through smaller arteries.When he reached the bodies, the arteries are divided into arterioles, smaller vessels, which in turn are divided into the capillaries.Since organs and tissues become saturated with oxygen and nutrients needed for normal body function.Similarly, taking the beginning of the capillary, venous blood enters the two large veins body, upper and lower.Then, it is delivered to the right atrium.The whole cycle is the systemic circulation.
Pulmonary, or another small circle of blood circulation does a shorter route.From the right ventricle of the heart departs large artery, which is divided into two pulmonary artery.So the blood enriched with oxygen is delivered to the lungs.Large artery divided into arterioles, and these in turn are divided into the capillaries.That they allow light to saturate with oxygen and cleared of carbon dioxide.Thus there is an exchange of gases in the lung.Then, venous blood flows through the veins to the left atrium.
Small and large circulation similar function of all organs.Arteries carry blood, rich in nutrients and oxygen to the organs and tissues.Vienna, in turn, return venous blood to the heart.Different is only the distance: big and small.Circulation function as the body's cells with oxygen saturation.But
circulation does not carry all the blood that is in the body.A certain amount of blood retained in the blood depot.They are found in the spleen, liver, lungs and blood vessels under the skin of the cluster.These depots are necessary for emergency saturation of organs and tissues of oxygen.
distribution of blood between the body organs are not evenly.Supply blood to the systemic circulation, depending on activity of the organ or tissue.This is due to the expansion and contraction of blood vessels.Blood to actively running body comes in larger quantities due to reduction of blood flow in other, less active organs.
circulation work through the system of blood vessels, and of course, the heart muscle.For delivery to organs and tissues of oxygen enriched blood and nutrients are responsible artery.Thanks to them, supported by the high pressure, ensuring rapid progress through the capillaries and blood saturation of tissues and organs.
blood passed through the circulation, contains the waste products of the human body and carbon dioxide.Such vessels carry blood, called veins.
capillaries also play an important role in the entire circulatory system.This extensive network of small vessels, on which the rich nutrients and oxygenated blood flows directly into the muscle tissue and organs.
entire circulatory system is of great importance in the life of the organism.The heart, blood vessels and circulation - is its main components.
