Friday, January 9, 2009
Face
GENERAL INFORMATION
The face is formed mainly from neural crest, which makes 3 swellings that surround the stomodeum:
• Frontonasal prominence
• Maxillary prominence (from the 1st pharyngeal arch)
• Mandibular prominence (from the 1st pharyngeal arch)
Lateral to the frontonasal prominence, 2 additional areas of ectoderm form the 2 nasal placodes that invaginate in the center to form nasal pits, creatng ridges of tissue on either side of the pits:
• Lateral nasal prominence
• Medial nasal prominence
Fusion of the medical nasal prominence at the midline result in formation of the intermaxillary segment.
Labels: Face
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