19 Facts About Circulatory system

Blood circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate.

The circulatory system has two divisions, a systemic circulation or circuit, and a pulmonary circulation or circuit.

The circulatory system is closed in vertebrates, which means that the blood never leaves the network of blood vessels.

The lymphatic system is a subsystem that is essential for the functioning of the blood circulatory system; without it the blood would become depleted of fluid.

Unlike the closed circulatory system, the lymphatic system is an open system.

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The circulatory system is further divided into two major circuits – a pulmonary circulation, and a systemic circulation.

Human circulatory system is closed, meaning that the blood is contained within the vascular network.

The lymphatic system is an essential subsystem of the circulatory system consisting of a network of lymphatic vessels, lymph nodes, organs, tissues and circulating lymph.

Separate Circulatory system known as the bronchial circulation supplies blood to the tissue of the larger airways of the lung.

The venous Circulatory system feeds into the two major veins: the superior vena cava – which mainly drains tissues above the heart – and the inferior vena cava – which mainly drains tissues below the heart.

The coronary circulation Circulatory system provides a blood supply to the heart muscle itself.

The arterial Circulatory system develops mainly from the aortic arches, six pairs of arches that develop on the upper part of the embryo.

Human venous Circulatory system develops mainly from the vitelline veins, the umbilical veins and the cardinal veins, all of which empty into the sinus venosus.

Not all congenital changes to the circulatory system are associated with diseases, a large number are anatomical variations.

In fish, the Circulatory system has only one circuit, with the blood being pumped through the capillaries of the gills and on to the capillaries of the body tissues.

Circulatory system ascribed the fact to the phenomenon that air escaping from an artery is replaced with blood that enters between veins and arteries by very small vessels.

Circulatory system stated that "there must be small communications or pores between the pulmonary artery and vein, " a prediction that preceded the discovery of the capillary system by more than 400 years.

Circulatory system firstly described it in the "Manuscript of Paris", but this work was never published.

However, Harvey was not able to identify the capillary Circulatory system connecting arteries and veins; these were later discovered by Marcello Malpighi in 1661.