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File:Sinoatrial node 2 low mag.jpg

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Summary

Description
English: Micrograph of the sinoatrial (SA) node. H&E stain.

The SA node fibre vaguely resemble cardiac myocytes; however, they are thinner, squiggly and stain less intensely (on H&E) than cardiac myocytes.

Description of the micrograph - the follow things are seen:

  • Cardiac myocytes of the right atrium are seen at the right/bottom.
  • Nodal artery, a branch of the right coronary artery is seen in the centre - on lumen.
  • Sinoatrial node surrounds the nodal artery and abuts the darker staining cardiac myocytes.
  • Lumen of the right atrium is on the left (endothelial lining not seen).
  • Epicardial apidose tissue is to the right of the SA node.
  • Epicardial space is on the right of the image.
  • Adjacent to nodal tissue is a nerve; the SA node interacts with fibres from the vagus nerve.
  • High mag. image of the same SA node.
    High mag. image of the same SA node.
  • Low mag. image of the same SA node.
    Low mag. image of the same SA node.
Source Own work
Author Nephron

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current01:35, 22 July 2010Thumbnail for version as of 01:35, 22 July 20102,588 × 2,054 (2.32 MB)Nephron{{Information |Description={{en|1=Micrograph of the '''sinoatrial (SA) node'''. H&E stain. The SA node fibre vaguely resemble cardiac myocytes; however, they are thinner, squig

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