The current study aimed to observe the morphological,and histological features of the colon in adult males and female swan geese. The study was carried out on 10 adult geese, with ages ranging from( one - two )years. These birds were used for anatomical and histological study. The coleomic cavity was dissected and photographed to identify the colon was grossly described and measured (weight, relative weight, length, relative length, and diameter and volume) . Colon the short, straight part of the large intestine, pale pink color, it was the caudal part of large intestine continuous with the ileum. Its situated ventral to the synsacrum and pelvic bone. It was extending from the end of the small intestine till it opens into cloaca, its related dorsally with the jejunum . Colon showed a velvet appearance with short finger-like projections. The histological study showed that the large intestine (colon) was characterized by folded mucosa and submucosa, the lining epithelium was simple columnar epithelium, while the isthmus was lined with stratified squamous epithelium, The mucosal glands different in size and shape occupied most of the lamina propria, The goblet cells showed high density toward the end of the intestine. The villi appeared different in size and shape, The submucosa appeared poorly developed layer. The layer of muscular mucosa was constructed of two layers of smooth muscle fibers. The serosa composed of connective tissue covered by a layer of mesothelium lined the wall of all the organs occupied with blood vessels, lymphatic vessels, and nerve plexus.
Maajal et al. (Mon,) studied this question.