Morphological Study of the Sinus Node and Its Artery in Yak
Article first published online: 8 OCT 2012
Copyright © 2012 Wiley Periodicals, Inc.
The Anatomical Record
Volume 295, Issue 12, pages 2045–2056, December 2012
How to Cite
Duan, D., Yu, S. and Cui, Y. (2012), Morphological Study of the Sinus Node and Its Artery in Yak. Anat Rec, 295: 2045–2056. doi: 10.1002/ar.22591
- Issue published online: 17 NOV 2012
- Article first published online: 8 OCT 2012
- Manuscript Accepted: 6 AUG 2012
- Manuscript Received: 16 MAY 2012
- The National Natural Science Foundation of China. Grant Number: 30960270
- sinus node;
- sinus node artery;
The sinus node of yak has been studied by the histological methods and transmission electron microscopy. The sinus node artery of yak was also determined by the injection-corrosion casting technique, the angiography, and histological methods. The results showed that the sinus node of yak contained an extensive framework of collagen and two main type cells: pacemaker cells (P cells) and transitional cells (T cells). The P cells had a perinuclear clear zone, contained less myofibrils, and appeared smaller mitochondria than T cells. The T cells were longer and slender than P cells, and had a variety of shapes. At the periphery of sinus node there were many nerve fibers and ganglions. Gap junction did not reveal reaction with anti-connexin43, but it was detected by electron microscopy in the central part of sinus node of yak. The sinus node artery of yak originated from left coronary artery more frequently (98%) than by right (2%). The artery located at the periphery of sinus node. It had an internal elastic membrane throughout its course, and a large nerve bundle was found running in a longitudinal direction. Anat Rec, 2012. © 2012 Wiley Periodicals, Inc.