File:Fetal thymus.jpg

From Embryology

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Fetal Thymus

Thymus lymphoid tissue, overview 20th week of gestation.

  • thymus is enclosed by a thin connective tissue capsule
  • numerous septa extend into the thymus subdividing the two lobes
  • two lobes divided into into numerous lobules (about 0.5 -2 mm in diameter).
  • Blood vessels enter and leave the thymus via the connective tissue septa.
  • Each lobulus is divided into
  • Medullary tissue is continuous from lobule to lobule throughout each lobe.

See Unlabeled overview and also compare this structure with the Adult Thymus.

Thymus Histology: Fetal Thymus overview | Fetal Thymus Medulla | Fetal Thymus Cortex | Adult Thymus | unlabeled fetal overview | unlabeled fetal medulla |unlabeled fetal thymic corpuscle |unlabeled fetal cortex | unlabeled adult overview | Category:Thymus | Immune System Development

Links: Histology | Histology Stains | Blue Histology images copyright Lutz Slomianka 1998-2009. The literary and artistic works on the original Blue Histology website may be reproduced, adapted, published and distributed for non-commercial purposes. See also the page Histology Stains.

Cite this page: Hill, M.A. (2024, April 13) Embryology Fetal thymus.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current18:40, 25 February 2012Thumbnail for version as of 18:40, 25 February 2012450 × 600 (122 KB)Z8600021 (talk | contribs)increase image size
11:01, 24 December 2010Thumbnail for version as of 11:01, 24 December 2010300 × 400 (28 KB)S8600021 (talk | contribs) Tyf04he.jpg