Thymus glands

Question 1

what is the thymus gland

Answer 1

a pink, lobulated lymphoid organ, located in the thoracic cavity and neck. In the adolescent,

Question 2

role of the thymus gland before and after puberty

Answer 2

it is involved the development of the immune system. After puberty, it decreases in size and is slowly replaced by fat.

Question 3

emryologically what is the thymus revived from

Answer 3

third pharyngeal pouch.

Question 4

arterial supply of the thymus gland

Answer 4

anterior intercostal arteries and small branches from the internal thoracic arteries.

Question 5

venous blood drainage of the

Answer 5

left brachicephalic and interal thorachic

Question 6

shape of teh thymus gland

Answer 6

The thymus gland has an asymmetrical flat shape, with a lobular structure.

Question 7

what are the lbes of the thymus gland

Answer 7

Cortical portion – Located peripherally within each follicle. It is largely composed of lymphocytes, supported epithelial reticular cells.
Medullary portion – Located centrally within each follicle. It contains fewer lymphocytes than the cortex, and an increased number of epithelial cells. Hassall’s corpuscles are also present – these are concentric arrangements of epithelial reticular cells. Their function is unclear.

Question 8

where is the gland mailing located

Answer 8

The gland is mainly located within the thoracic superior mediastinum, posterior to the manubrium of the sternum. However, in some individuals, it can extend superiorly into the neck (reaching the thyroid gland), and inferiorly into the anterior mediastinum (lying in front of the fibrous pericardium).