This MedLibrary.org supplementary page on Pulmonary valve is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
| Pulmonary valve | |
|---|---|
.svg) |
|
| Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. | |
 |
|
| Heart seen from above. | |
| Latin | valva trunci pulmonalis |
| Gray's | subject #138 532 |
| MeSH | Pulmonary+Valve |
The pulmonary valve, is the 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 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.
Additional images
 Interior of right side of heart. |
See also
External links
 |
This cardiovascular system article is a stub. You can help Wikipedia by expanding it. |
|
||||||||||||||||||||
Wikipedia content modification information:
- This page was last modified on 4 June 2008, at 00:37.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Pulmonary valve".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.