Morphometrical Changes of Abdomino - Inguinal Mammary and Post - Weaning the Arterial Walls of Main Glands of Rat from Virgin Arteries from Heart to the through Pregnancy , Lactation

ABsTRAcu'. Morphometrical changes of the arterial walls from the ascending aorta to the abdomino-inguinal mammary glands of rat from virgin through pregnancy, lactation and post-weuning stages were investigated by using a light microscope and an image analyzer, Based on the histological architecture and organization of connective tissue fibers and smooth muscle ceils in the media, the arterial segments were clearly identified into three types; elastic, transitional and mllscular types. The ascending aorta, the aortic arch, the thoracic aorta and the abdominal aortft were identified as elastic type and the maximum number of elastic lame}lae was recorded in the ascending aorta as 1O-13. In elastic type of arteries, the tunica media was thicker than other tunics with the exception of the abdominal aorta, in which the tunica externa was a little bit thicker than that of the media. From the external iliac artery to the proximal part of the femoral artery, the arterial segments were transitional in type and the elastic larnellae were rangecl from 1-3 in numbers. The deep circumfiex iliac, the external pudendal, the caudal superficial epigastric, and the mammary arterjes were identified as muscular type, and