File:Bundleofhis.png

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Bundleofhis.png (400 × 483 pixels, file size: 69 KB, MIME type: image/png)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]

Schematic representation of the atrioventricular bundle of His. The bundle, represented in red, originates near the orifice of the coronary sinus, undergoes slight enlargement to form the AV node. The AV node tapers down into the bundle of HIS, which passes into the ventricular septum and divides into two bundle branches, the left and right bundles. Sometimes the 'left and right bundles of His' are called Purkyne or Purkinge fibres. The ultimate distribution cannot be completely shown in this diagram.

This image is misleading. Although it correctly places the SA and AV nodes in the right atrium, it appears as though there are only two papillary muscles in the right ventricle and three in the left ventricle. The opposite is actually true. The papillary muscles attach to chordae tendinae which then attach to the leaflets of the AV valves, preventing prolapse. The left AV valve is the mitral or bicuspid and only has two leaflets and therefore two papillary muscles. The right AV valve is the tricuspid and should have three papillary muscles corresponding to the three leaflets of the valve.


Licensing

[edit]
Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.

United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current17:40, 20 September 2006Thumbnail for version as of 17:40, 20 September 2006400 × 483 (69 KB)Kauczuk (talk | contribs)Bundle of His, from Gray's Anatomy 1918

There are no pages that use this file.

File usage on other wikis

The following other wikis use this file: