Gross anatomical and morphometrical studies on the thymus of vanaraja chicken
Anatomical studies on thymus of vanaraja chicken
DOI:
https://doi.org/10.21921/jas.v12i01.15231Keywords:
Morphometric, Vanaraja chicken, Thymus, GrossAbstract
The present study was conducted on the thymus of forty (40) day-old Vanaraja chicks, procured from the Livestock Farm Complex, BVC Patna, and reared up to six months of age. Birds were divided into four age groups: 0, 30, 90, and 180 days. From day one, the thymus appeared as a paired, lobulated organ located on either side of the neck, forming the left and right thymus. Each thymus comprised 4–6 lobes arranged in a chain extending from the mid-cervical to the cranial thoracic region. Lobes were embedded in subdermal connective tissue, irregularly elliptical in shape, with smooth surfaces, and varied in color from pale white to yellowish-white and pale pink.The maximum weight and volume of both thymic lobes were recorded at 30 days of age. Thymic size increased up to day 30, followed by a gradual decline from day 90 onward. Although the right thymus tended to weigh more than the left, the difference was not statistically significant. Significant changes in thymic weight, volume, length, and width were observed across age groups. The largest dimensions were recorded at 30 and 90 days, while significant regression in both lobes was observed by 180 days of age.
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