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Sumario Embriología de cabeza y cuello
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Resumen de embriología de cabeza y cuello
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Embriologia de Cabeza y CuelloMESENQUIMA para formar CARA↓
Mesodermo paraxial → suelo de cavidad occipital- músc. voluntarios craneofaciales- dermis y
tejidos conjuntivos dorsal de la cabeza y meninges
Mesodermo de la placa lateral → cartilagos laringeos
Células de la cresta neural → en neuroectodermo el prosencéfalo, mesencéfalo y
rombencéfalo, migran ventral a los arcos faringeos y rostral al prosencefálico cupula óptica
Células de placodas ectodermicas junto c/ cresta neural →Neuronas del 5°, 7°, 9° y 10°
ganglios sensitivos craneales
Membrana bucofaríngea:maraca límite entre ESTOMODEO -adelante- rev. ectodermo(boca) y Intestino Faríngeo-atrás- rev.
endodermo.
PLACODAS-procesos: engrosamientos ectodérmicas que van a formar→ órgano de sentidos
«Arcos faringeos»
Núcleo tejido mesenquimatico A partir del MESODERMO INTRAEMBRIONARIO cubierto x ectodermo de superficie y epitelio endodermic
el núcleo recibe células de la cresta neural → formar esqueléto de la cara .
Mesodermo inicial → musculatura y c/ arco tiene musculo, un par craneal y componente arterial propio.
Arcos faringeos aparecen en 4° y 5° semana al principio separadas x HF. Contribuyen a la formación de la cara
Final de 4° semana se forma el centro de la cara x Estomodeo rodeado x 1°AF
Prominencias maxilar es inferiores o primer arco faríngeo
Prominencias maxilar es superiores parte dorsal del primer arco
En todos casos la diferenciación depende interacciones entre el epitelio y la mesénquima
«Bolsas faríngeas»
Envaginaciones entre arcos A partir de ENDODERMO hacia afuera (amarillo). Se forman bolsas faríngeas laterales al intestino faríngeo
qué ingresan en el mesénquima. 4 pares y el 5° es rudimentario tiene un
revestimiento endodermico epitelial.
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