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Pulmonary artery: Wikis

  

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Artery: Pulmonary artery
Right ventricle Left ventricle Aortic valve Mitral valve Left atrium Right atrium Aorta Pulmonary valve Tricuspid valve Inferior vena cava Superior vena cava Pulmonary artery Pulmonary vein Diagram of the human heart (cropped).svg
About this image
Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. (Pulmonary artery labeled at upper right.)
Alveoli diagram.png
Diagram of the alveoli with both cross-section and external view.
Latin truncus pulmonalis, arteria pulmonalis
Gray's subject #141 543
Source right ventricle   
Vein pulmonary vein
Precursor truncus arteriosus
MeSH Pulmonary+Artery

The pulmonary arteries carry blood from heart to the lungs. They are the only arteries (other than umbilical arteries in the fetus) that carry deoxygenated blood.

In the human heart, the pulmonary trunk (pulmonary artery or main pulmonary artery) begins at the base of the right ventricle. It is short and wide - approximately 5 cm (2 inches) in length and 3 cm (1.2 inches) in diameter. It then branches into two pulmonary arteries (left and right), which deliver deoxygenated blood to the corresponding lung.

Contents

Role in disease

Pulmonary hypertension occurs alone and as a consequence of a number of lung diseases. It can also be a consequence of heart disease (Eisenmenger's syndrome) but equally a cause (right-ventricular heart failure); it also occurs as a consequence of pulmonary embolism and scleroderma. It is characterised by reduced exercise tolerance. Severe forms, generally, have a dismal prognosis.

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Simple English

The pulmonary artery is a blood vessel that connects the heart to the lungs. The pulmonary artery carries blood that does not have much oxygen. The blood from throughout the body is taken into the heart by the right atrium into the right ventricle. The blood is pumped into the pulmonary artery and into the lung capillaries. When the blood passes through the capillaries slowly to absorb the oxygen from the lungs. The oxygenated blood is taken through the pulmonary vein back into the heart through the left atrium and the left ventricle. It is then pumped throughout the body.








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