Vol. 8, Issue 1, Part B (2023)

Our study was aimed to morphological and histological results, so the study was included some special stains for histochemical study of adult age of local pigeon Columba livia. Six pigeons were sacrificed. The morphological study had three parts of the small intestine duodenum, jejunum and ileum. The duodenum was U-like to connect between gizzard and jejunum. Ascending and descending duodenum includes the pancreas. The jejunum was characterized coil tube and anastomosed at anteriorly with duodenum and caudally with ileum. Ileum was the last part of small intestine. Generally, the histological sections were included entire the small intestine. Light microscope showed histological structures to mucosa, submucosa, musculais and serosa. Mucosa was included long finger project is called villi. These finger structures were different in length during duodenum, jejunum and ileum. Where lengths of the duodenum were taller. So it's lined by simple columnar epithelia with basal nuclei. Either lamina properia was located under epithelia which it's characterized loose connective tissue and included intestinal glands with crypts of Lieberkuhn is lined by simple columnar cells. Muscularis layer was last tunica in mucosa, it's composed from longitudinal smooth muscles. Others tunica, submucosa was thin layer of dense connective tissue almost no obvious during histological sections. So tunica musculais was consisted of two orientations smooth bundles, first longitudinal orientation is outer while inner layer had been circular smooth fibers. Final tunica was serosa. The present study showed histochemical reaction between goblet cells, where it's appeared the periodic acid Schiff the mucin secretion of their cells is neutral positive reaction while alcian blue stain showed acidic positive reaction of the secreted goblet cells.