Morphological, Histological and Histochemical Comparative Investigations of the Liver in Young Homing Pigeon (Columba Livia Domestica) and Cattle Egret (Bubulcus Ibis)
Morphological, Histological and Histochemical Comparative Investigations of the Liver in Young Homing Pigeon (Columba Livia Domestica) and Cattle Egret (Bubulcus Ibis)
Sozan A.A. Ismaeil1*, Hassan Emam2
ABSTRACT
The current investigation on 30 healthy slaughtered young homing pigeons and Ibis. The samples were fixed and processed for the histological and histochemical examination of the liver. Pigeons were collected from the squab breeder while Ibis were collected from streets at Shariq province. The morphological findings showed that the liver of two species of birds is located in a hepato-peritoneal cavity, and each is composed of two undivided lobes, a large right lobe and a small left one which have light brown to dark red in pigeon and dark red in ibis. The histological structure of the organ in both species was different, were consisted of several lobules that were not separated from each other by trabeculae and covered by connective tissue capsule. The liver tissue of pigeon without a gall bladder. Histologically in both lobes beneath the thin capsule, while liver Ibis with gall bladder in both lobes covered with thick c.t capsule contains also many lymphatic cords especially under the capsule and hemopoietic tissue around the central vein, portal areas and between hepatocytes. Histochemical: in the liver of pigeons gave few amounts of reticular, collagen, and elastic fibers with silver, Crossman, and Orcein stains respectively and faint positive reaction with PAS while in the liver of Ibis was vice versa. This study aims to understand normal gross anatomy and histology of the liver in Young Homing Pigeons and Cattle Egrets. It can be concluded that the presence of gall bladder and absence of it and habit of feeding significantly affected the gross and histological structure of the liver.
Keywords | Cattle egret, Histology, Liver, Morphology, Pigeon
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