Thymus

From WikiLectures

The Thymus is an organ responsible for the maturation of immature T-cells

Structure[✎ edit | edit source]

  • It has an asymmetric and bi-lobed structure
  • It is approximately 5cm long and 4cm wide
  • It has a cortex and a medulla - the cortex is made of a mesh-work of epithelial reticular cells and thymocytes, the immature versions of T-cells; the medulla is made of thymocytes that are in their latter stages of development

Position[✎ edit | edit source]

  • It is located at the anterior part of the mediastinum
  • It is posterior to the manubrium of sternum
  • Its lower portion lies over the pericardial sac
  • It is at the T4-5 level

Syntopy[✎ edit | edit source]

Thymus.png

Function[✎ edit | edit source]

  • It is involved in the early development of the immune system and causing thymocytes to develop into T-cells
  • The size of the thymus is large in children and naturally atrophies after puberty

Links[✎ edit | edit source]

Bibliography[✎ edit | edit source]

SNELL, Richard S. Clinical Anatomy by Regions. 8th Edition edition. 2004. ISBN 978-0-7817-6404-9.