File:Fetal head medial.jpg

From Embryology

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Fetal Head (12 weeks)

Image shows the distribution of skull bone:

  1. forming from cartilage (chondrocranium, endochondrial ossification).
  2. forming directly mesenchyme (intramembranous ossification).

Medial view, stained for bone (alizarin red) and cartilage (alcian blue). In this medial (internal) view, note the distribution of cartilage from the nasal region through the base of the skull to the atlas/axis (with new bone forming).

  • Note the original Meckel's cartilage within the newly forming bony mandible.
    • Meckel's cartilage visible in the medial view within the newly forming bone.
  • Cartilage in the neck where the hyoid bone will eventually form.

12 Week Images: Sagittal unlabeled | Sagittal labeled | Sagittal medial view | Sagittal lateral view | Pituitary unlabeled | Pituitary labeled | Tongue | Skull Development | Head Development | Bone Development

Ossification Images: Fetal head - lateral view |Fetal head - medial view

Image Source: Prof Virginia Diewert

Cite this page: Hill, M.A. (2024, June 22) Embryology Fetal head medial.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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Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan

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