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12 Cards in this Set

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Thymus
A bilobed organ where T cells develop immunocompetence
Location of thymus
Mediastinum
The thymus is surrounded by?
A protective connective tissue capsule
Trabeculae
extension of capsule; divides lobes into lobules
Trabeculae (latin)
Little beams
Cortex (thymus)
-Deeply stained
-Consists of highly packed lymphocytes and epithelial cells "reticular epithelial cells"
Medulla (thymus)
-Lightly stained
-Reticular epithelial tissue
-Scattered lyphocytes
-Thalamic (Hassal's) corpuscles
Thalamic (Hassal's) Corpuslces
Concentric layers of reticular epithelial cells, filled with keratohyalin granules- function unknown
How does the thymus function in immunity?
Has lymphocytes, one type of white cell, which in turn is either a T cell or B cell depending on its role in immunity
Thymic hormones help in the formation and proliferation of what type of cells?
T cells- produce hormones and reticular epithelial cells form
T cell
Type of white blood cell
Examples of thymic hormones
Thymosin
Thymic humoral factor (THF)
Thymic factor
Thymopoietin