جامعة تكريت - كلية الطب البيطري - جامعة تكريت

E-mail : عنوان البريد الإلكتروني هذا محمي من روبوتات السبام. يجب عليك تفعيل الجافاسكربت لرؤيته. عنوان البريد الإلكتروني هذا محمي من روبوتات السبام. يجب عليك تفعيل الجافاسكربت لرؤيته.

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Abstract

Thymus gland in turkey bird and its distinctive anatomical and histological features were highlighted with paying special attention to the anatomical  location, shape, boundaries and the blood supply as well as the histological structure in the Iraqi local breed turkey (Meleagris gallopavo). Ten healthy birds from the local breed of Turkey were taken and divided into two equal groups: five birds for anatomical study and five birds for histological study. The gross description including the shape, color, location and blood supply as well as the histological structure of thymus gland were recorded. The anatomical results showed that thymus gland in turkey located along either side of the neck, lying close to the jugular vein, common carotid artery and the brachial plexus and in contact with thyroid gland in the base of the neck at the thoracic inlet on each sides of the body, it consisted of a long chain on each side having (6-8) lobes with whitish-yellowish to pinkish color and irregular to flattened shape. Thymus gland in turkey was supplied with blood by direct and indirect branches of the following arteries: the cranial thyroid, the caudal thyroid and the ascending esophageal arteries which almost derived from the common carotid artery. Histologically the gland consisted of numerous lobes and covered by connective tissue capsule which sent numerous septa and divided it into lobules, each lobule was organized into outer darkly stained cortex and inner lightly stained medulla, cortex was enriched with densely packed lymphocytes with small size and darkly stained while medulla was consisted of many epithelial cells and appeared lightly stained because it occupied by large size lymphocytes with acidophilic cytoplasm. The epithelial reticular cells might be arranged together with the lymphocytes to form the Hassal’s corpuscles.

Key words: Turkey thymus gland, Anatomical study of thymus, Histological structure of thymus, Blood supply of thymus,  Meleagris gallopavo.