Histomorphogenesis of pancreas in ostrich embryo (Struthio camelus)

The purpose of this study was evolution of pancreas in ostrich. The study was done on 24 incubated eggs of ostrich embryo on 10, 13, 16, 22, 26, 30 and 36 days of prehatching and 1 day of post hatching life. The histological stains such as haematoxylin eosin (H amp;amp;E), gomori and Toluidine blue were used for this study. On 13th day of incubation the primary pancreas was developed near the liver and duodenum and it was composed of one part. The pancreas was consisted of undifferentiated epithelial cells, connective tissue, non-organized ducts and blood vessels. On 16th day the pancreas was composed of dorsal and ventral lobe with the similar structure to 13th day. On the 22th day, the zymogen granules were evident in developing exocrine part. By aging the level of connective tissue and ducts were decreased and the acinar cells were increased. On 1th day after hatching the hepatocytes vacuolated severely and pancreatic islets were appeared.