Pulmonary valve 612367 216965157 2008-06-04T00:37:42Z Razorflame 5792322 Reverted edits by [[Special:Contributions/98.207.2.184|98.207.2.184]] ([[User talk:98.207.2.184|talk]]) to last version by ClueBot {{Infobox Anatomy | Name = {{PAGENAME}} | Latin = valva trunci pulmonalis | GraySubject = 138 | GrayPage = 532 | Image = Diagram of the human heart (cropped).svg | Caption = Anterior (frontal) view of the opened [[heart]]. White arrows indicate normal blood flow. | Image2 = Gray494.png | Caption2 = Heart seen from above. | Width = 300 | System = | MeshName = Pulmonary+Valve | MeshNumber = A07.541.510.738 | }} The '''pulmonary valve''', is the [[heart valves|semilunar valve]] of the heart that lies between the [[right ventricle]] and the [[pulmonary artery]] and has three cusps. Similar to the [[aortic valve]], the pulmonic valve opens in [[cardiac cycle|ventricular systole]], when the pressure in the right ventricle rises above the pressure in the pulmonary artery. At the end of ventricular systole, when the pressure in the right ventricle falls rapidly, the pressure in the pulmonary artery will close the pulmonic valve. The closure of the pulmonic valve contributes the P2 component of the second [[heart sound]] (S2). The right heart is a low-pressure system, so the P2 component of the second heart sound is usually softer than the A2 component of the second heart sound. However, it is physiologically normal in some young people to hear both components separated during [[inhalation|inhalation]]. ==Additional images== <gallery> Image:Gray493.png|Interior of right side of heart. </gallery> ==See also== * [[Heart valve]] ==External links== * {{SUNYAnatomyFigs|20|07|00}} {{circulatory-stub}} {{Heart}} [[ja:肺動脈弁]] [[nn:Pulmonalklaff]]