Circulatory System

The circulatory system moves blood throughout the body.  The circulatory system is comprised of the heart, arteries, capillaries, and veins.  The circulatory system transports oxygenated blood from the lungs and heart throughout the body via the arteries. The blood flows through the capillaries, which run between the arteries and veins.  The blood with oxygen depleted by the body is returned to the lungs and heart through the veins.

The body's circulatory system has three distinct parts: pulmonary circulation (the lungs), coronary circulation (the heart), and systemic circulation (the rest of the system).  Pulmonary circulation is the movement of blood from the heart, to the lungs, and back to the heart again. Veins bring waste-rich blood back to the heart, which pushes the blood into the pulmonary artery leading to the lungs.  The lung capillaries then exchange the carbon dioxide and oxygen.  The fresh, oxygen-rich blood enters the pulmonary veins and returns to the heart, where it is pumped out through the main artery, called the aorta, and back into the circulatory system.  Coronary circulation deals with the movement of blood through the tissues of the heart.  Serious heart damage can occur if the heart tissue does not receive a normal supply of food and oxygen.  The heart tissue receives nourishment through the capillaries located in the heart.  Systemic circulation supplies nourishment to all of the other tissues located throughout the body.  The blood vessels (arteries, veins, and capillaries) are responsible for the delivery of oxygen and nutrients to the tissue.  The waste-rich blood in the circulatory system flows into the veins in order to circulate back to the heart where pulmonary circulation will allow the exchange of gases in the lungs.  During systemic circulation, blood passes through the kidneys.  This phase of systemic circulation is known as renal circulation.  During this phase, the kidneys filter the waste from the blood.  Blood also passes through the small intestine during systemic circulation in a phase known as portal circulation. During this phase, the blood from the small intestine collects in the portal vein that passes through the liver. The liver filters sugars from the blood, storing them for later.

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Circulatory System Nutraceutical Products: Essential Seven