In the current study, ten adult healthy local dogs of both sexes were used to perform histomorphometrical study on their pancreases. The dog pancreas had an inverted V-shape consisting of left and right lobes joined by a body. The pancreas possesses both exocrine and endocrine parts. The exocrine portion was composed of numerous acini and fewer tubules as well as the duct system. The number, total diameter and cellular height of acini were significantly abundant, larger and taller in the right lobe compared those of the body and left lobe. Furthermore, the number and total diameter of large pancreatic islets were significantly abundant and larger in the left lobe despite with those of the body and right lobe. This result leads to consider the right lobe was a target region for enzymatic secretion, while the left lobe has a specific function for hormonal secretion. According to available literature, no such result and thus conclusion had been reported on dog pancreas previously. In all parts of the pancreas and with aldehyde fuchsin stain, only the large pancreatic islets contained α-, β-, δ-cells as well as non-staining cells. Only, the β-cells occurred as single cells between the pancreatic acini or even within the connective tissue septa. These single cells were more numerous in the left lobe, but they were infrequently located in the body and right lobe.

This research was carried out to study the arterial blood vessels of the pancreas in dogs by using latex injection. The six adult male and female dogs were collected from Sumel town-Duhok governorate, Kurdistan region-Iraq. Our results exhibited that the left lobe of dog pancreas was supplied by pancreatic branches originated from celiac, splenic and gastroduodenal arteries. The right lobe was equipped by pancreatic branches aroused from both cranial and caudal pancreaticoduodenal arteries which were anastomosed within the gland. In addition to supply the right lobe, the cranial pancreaticoduodenal artery was also supplied the body of pancreas. The present study recorded a significant variation in the origin, number and distribution of most aforementioned arteries. Therefore, the anatomists and surgeons should take this into account during dissected of cadavers or performed the surgical operations.