Document Detail

Morphological study on microvasculature of left ventricular wall in infant and adult yaks.
MedLine Citation:
PMID:  20652942     Owner:  NLM     Status:  MEDLINE    
Observations on the microvasculature in the left ventricular wall of infant and adult yaks under light and scanning electron microscope (SEM) were presented. Moreover, the diameter of different microvasculature and the density of the capillaries in three layers of the ventricular myocardium were measured using Image Pro-Plus 5.0. The results showed that the average luminal diameter of arterioles and precapillary arterioles in adult yak's hearts were, in most cases, larger than those in infant yaks. On the contrary, the diameters of the capillary in infant yak's hearts were larger than those in adult yaks. The density of capillary in the myocardium of adult yak's heart had significantly higher values (P<0.01) than those in infant yaks. Arterioles of yak's hearts were characterized by the bark-like structure and the impressions of endothelial cell nuclei, and it always gave rise to capillary after three to four grades of embranchment. The outer surface of capillaries cast in infant yak's hearts was smooth, and no constrictions were found. This was different from adult yak that always had some constrictions. The capillary anastomosis of "H" and "Y" usually existed in the myocardium of both adult and infant yaks; however, those in infant yaks were not typical as in adult yaks in their shape. The peculiar arrangement of the venules in infant yak was a "baggy" or "bulgy" arrangement, while in the adult yak, they had a root-like pattern. Our findings suggest that the patterns of microvasculature in yak's heart could be propitious to adapt better in their environment following their increase of age.
Y Y He; S J Yu; Y Cui; P Du
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anatomical record (Hoboken, N.J. : 2007)     Volume:  293     ISSN:  1932-8494     ISO Abbreviation:  Anat Rec (Hoboken)     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-14     Completed Date:  2010-09-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101292775     Medline TA:  Anat Rec (Hoboken)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1519-26     Citation Subset:  IM    
Copyright Information:
2010. © 2010 Wiley-Liss, Inc.
Instrumental Research and Analysis Center, Gansu Agricultural University, Gansu, China.
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MeSH Terms
Arterioles / anatomy & histology,  ultrastructure*
Capillaries / anatomy & histology,  ultrastructure*
Cattle / anatomy & histology*
Heart Ventricles / anatomy & histology,  ultrastructure*
Microscopy, Electron, Scanning
Myocardium / ultrastructure
Venules / anatomy & histology,  ultrastructure*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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