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truncus pulmonalis, arteria pulmonalis
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141
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543
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Anterior (frontal) view of the opened heart White arrows indicate normal blood flow (Pulmonary artery labeled at upper right)
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Alveoli diagrampng
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Diagram of the alveoli with both cross-section and external view
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Right Ventricle
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Pulmonary Vein
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Pulmonary+Artery
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A07231114715
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The carry
Blood from the
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 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 .
Pulmonary Hypertension occurs alone and as a consequence of a number of
Lung Diseases . It can 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.
