<Tr> <Th> FMA </Th> <Td> 45842 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> A pulmonary artery is an artery in the pulmonary circulation that carries deoxygenated blood from the heart to the lungs . The largest pulmonary artery is the main pulmonary artery or pulmonary trunk from the heart, and the smallest ones are the arterioles which lead to the capillaries that surround the pulmonary alveoli . </P> <P> In order of blood flow, the pulmonary arteries start as the pulmonary trunk or main pulmonary artery . The main pulmonary artery begins at the base of the right ventricle . It is short and wide--approximately 5 centimetres (2.0 in) in length and 3 centimetres (1.2 in) in diameter . </P>

How is the blood in the pulmonary artery different from blood in other arteries