File:Human placental villi cartoon 01.jpg

From Embryology

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Human Floating Chorionic Villi

A figure showing the changes in placental villi between early (first trimester) and late (third trimester) placental development.

Villi Structure:

  1. syncytiotrophoblast and cytotrophoblast change their cellular organisation.
  2. Capillaries increase within the villi, at term nearly the entire villi is occupied by capillaries with only minimal surrounding connective tissue.
  3. Hofbauer cells are abundant in villi in both first and second trimesters (though only shown in the term villi). Later Hofbauer cells may have a different embryonic origin.

Links: placental villi | syncytiotrophoblast | cytotrophoblast | Hofbauer cells


Figure based Fig 1.B Malassiné et al. Retrovirology 2008 5:6 doi:10.1186/1742-4690-5-6.

Cite this page: Hill, M.A. (2024, April 23) Embryology Human placental villi cartoon 01.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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current12:13, 3 June 2012Thumbnail for version as of 12:13, 3 June 20121,084 × 663 (142 KB)Z8600021 (talk | contribs)==Human Floating Chorionic Villi== ===Reference=== Figure based Fig 1. Malassiné et al. [ Retrovirology] 2008 5:6 doi:10.1186/1742-4690-5-6.