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CRANIOFACIAL DEVELOPMENT AND PHARYNX
C1-C7: Beginning of trachea, oesophagus. Nasal placodes (nasal pit forming on one side). Forebrain. note proximity of nasal pit to prosencephalon (future site of olfactory nerve). In C2-C4, identify the medial and lateral nasal swellings.
DEVELOPMENT OF RESPIRATORY SYSTEM & GIT1
C2: Commencement of trachea and oesophagus with dense mesenchyme. R. nasal pit. Prosencephalon.
DEVELOPMENT OF THE NERVOUS SYSTEM
C1-5: Forebrain. Also identify the sulcus limitans separating the alar and basal plates.
