This project was carried out to find out the structural histomorphological changes that take place in the pelvic parts (vagina and vestibule) of the female reproductive system of the rabbits (Oryctolagus Cuniculus) at three different postnatal periods of their life that were kitten, immature and mature does. To conduct such project, twenty four female rabbits were bought (8 for each age) from the local breeders. Rabbits were euthanized, dissected and subsequently vaginae and vestibules were collected and fixed with 10% neutral buffered formalin then subjected to routine processing, such as dehydration, clearing, embedding and block preparation. Finally, sectioning for 6 µm were prepared and stained with hematoxylin-eosin and Masson's trichrome stains. Gross findings revealed that the vagina and vestibule in the local rabbits were characteristically very long tube-like structures. The vagina entirely was running ventral to the rectum together with vestibule in the pelvic cavity. Microscopic findings revealed prominent structural changes in the vagina of immature does compared to those of kittens and mature does indicated that immature does after the period of weaning face great developmental growth and changes. The microscopic changes in the vestibule were slight alterations and no age related changes were recorded. Statistical analysis revealed that the total thickness of the mucosa plus muscularis of the vaginal wall was decreased significantly in the direction cranio-caudally.In conclusion, the current study recorded differences in both macroscopic and microscopic aspects of the vagina and vestibule of the local rabbits compared to other animal species.

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This work was focused on the vomeronasal organ (VNO) anatomically and histologically in Iraqi sheep. Vomeronasal organ (VNO) plays essential role in the urinary sensation pheromones (sexual scent) which has not been studied extensively. In this study, six samples of the VNO for both sexes, adult were taken from the normal heads of Iraqi sheep Alawasi. The VNO was located in the anterior portion, just in the floor of the nasal septum (ventrolaterally), it is a tubular crescent shape, 6 cmin length and opens cranially in the incisive duct and blinded end caudally at the level of 2nd upper premolar tooth. Histological examination of the VNO was revealed three regions were divided into cranial, middle and caudal. It is encompassed inside a cartilaginous capsule which appeared as U- shape in the cranial region, while in the middle region was a free ends of the U-shape beside separation the narrow cleft dorsally, in the caudal region the cartilage became circular (ring shape) and surrounding the VNO completely, which separated the organ from the respiratory epithelium of nasal cavity. The lumen of VNO appeared in cranial and middle region as a comma shape, while, the caudal region was heart in shape, the border was irregular due to the folding of epithelial mucosa. The lumen of VNO was lined by a sensory medial wall showing the bipolar sensory neuron supporting and basal cells and non-sensory epithelium in the lateral wall was contained the basal cells, ciliated columnar and goblet cells.