File:Fetal head section.jpg

Human Fetal Head Week 12

Selected medial head (12 weeks) view showing key features of head musculoskeletal and neurological development. Note extensive nasal cartilage, nasal conchae, pituitary, secondary palate, oral cavity, tongue, mandible, hyoid, choana, oropharynx. Also note the developing tongue musculature and its mandibular attachment site.

This mid-line section through the fetal head shows features of the developing skull and the brain, face and mouth.

Neural

• developing brain and brainstem.
• lamina terminalis (site of anterior neuropore closure).
• fourth ventricle.
• developing pituitary sitting in the sella turcica.

Musculoskeletal

• cartilage - septum of the nose.
• bone - ossifying nasal concha.
• bone - palate roof of mouth.
• cartilage - soft palate back of mouth.
• cartilage - base of skull and vertebra.
• muscle - tongue, attached to mandible, note foramen cecum.
• bone - mandible.

Links: Week 12 - Head histology | Week 12 - Head medial cartilage/bone | Week 12 - Head lateral cartilage/bone | Head Development | Gastrointestinal Tract Development | Bone Development

Source: Prof Virginia Diewert Original File Name: 12weekhead.jpg

Cite this page: Hill, M.A. (2024, April 19) Embryology Fetal head section.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Fetal_head_section.jpg

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