1.BranchialApparatus(weeks4-5)1.1 Position: both lateral sides of headdorsoventrallyplaced.Embryonicpharynx2123105mesenchyma3
1. Branchial Apparatus (weeks 4-5) 1.1 Position: both lateral sides of head, dorsoventrally placed. Embryonic pharynx mesenchyma
1.2 ComponentsBranchial arches: 6 paired bars of mesenchyme;Branchial grooves: 5 ectoderm invaginations;3) Pharyngeal,pouches: 5 pairs of evaginations frompharyngealendoderm;I membranes: appositional grooves and4)1Branchialpouches
1.2 Components 1) Branchial arches: 6 paired bars of mesenchyme; 2) Branchial grooves: 5 ectoderm invaginations; 3) Pharyngeal pouches: 5 pairs of evaginations from pharyngeal endoderm; 4) Branchial membranes: appositional grooves and pouches