Histological Development Of Ileum In New Zealand Rabbit(Oryctolgus Cniculus) Embryos During Pregnancy,

Abstract

he histological developments in the ileum during the fetal stage, childbirth and the lactation period were studied in twelve pregnant females, where it was divided into 6 rabbits during pregnancy and 6 rabbits after birth, where 49 rabbit embryos were collected, divided into 7 embryos for each stage of pregnancy, childbirth and lactation, where the combined optical microscope was used while studying . Where the results showed the emergence of short villi covered with simple columnar epithelial cells consisting of blue-colored cystic cells scattered between gastric absorptive cells and mitotic cells and the emergence of intestinal crypts in the tunica submucosal at age (25E) of pregnancy. The mucosal layer appears for the first time at the age of (0P) day Childbirth Muscle fibers are characterized by the presence of Auerbach's strands intertwined with each other in the tunica external . The lactation stage (7P) after birth represents the emergence of lymphoid tissue in swollen vesicles in the form of domes with the emergence of circular folds within the tunica mucosa and submucosal tunica and the absence of Bayer smear during this stage with the continuation of the histological changes and the appearance of Bayer smear in this part of the small intestine in advanced stages Of old. This study represents great medical importance in the study of digestive disorders related to this part and how to maintain the health of microbes on the one hand and study the formation of lymph tissue after birth and stimulate it by external antigens on the microorganisms and thus induce an immune response by specialized lymphoid tissues associated with the intestine known as the Bayer plaque. Payers patches or (PPs) on the other hand