[Histomorphological and histomorphometrical study of embryonic renal artery in Mehraban ewes]

ABSTRACT

To study microscopic structure of renal artery and measurement of histomorphometrical parameters before birth. Observational study. Twelve embryonic artery of both sexes at 3 and 4 months age. Samples of arteries were taken and fixed in 10% formalin. The process was done in autotechnicon. Sections of 6 micron were stained by H and E and green mason trichrom and studied under light microscope. Descriptive statistics. All 3 layers of the wall of vessels were well developed in both sexes and ages of renal artery. In both ages, hitomorphometrical studies showed that total diameter of renal artery in males was lesser than the females. Increase in age increased thickness of wall and diameter of lumen. While there were not significant difference between sexes, the measured parameters of renal artery showed significant difference between age groups. Histomorphological structures of embryonic renal artery in sheep showed 3 vascular layers. Internal elastic membrane was clearly and external elastic membrane was poorly observed and in some regions was interrupted. The recent layer will completely develop after birth by development of blood circulation. Increase in the age increase percentage of tunica media. On the other hand, percentage of other layers showed partially decrease