Embriologi telinga, hidung, sinus paranasal

Embryology of Ear, Nose, and Paranasal SinusesEar EmbryologyInternal earMedial earExternal earInternal EarOtokistaIn embryo aged + 22 dayThickness of ectoderms surface in both of rombencephalon side (Plakoda Ear)Invagination quickly; form otokistaDivided into:Ventral unsure: sacculus and ductus cochlearisDorsal unsure: utriculus, canalis semicircularis, and ductus endolymphaticus.Structure of epithelial is form : membranose maze

Medial EarCavum tympanicFrom endoderm; from first sac pharynxGrow quickly to lateral side; stick to the first floor of the cleft of the pharynxDistal part (recessus tubotympanicus) : wide and form cavum tympanic primitiveProcsimal part : remains narrow and form audivita tube (Eustachius tube)

Osikula audicusMalleus and incus from the first arch cartilage pharynxStapes from the second arch cartilage pharynxExternal EarAuriculaFrom six mesenchymal proliferationIn the dorsal end of the first and second pharyngeal archMeatus Acusticus ExternusFrom dorsal part of the first pharyngeal cleftBeginning of third month epithelial cells proliferate at the bottom of this holeMembranose TympanicCreated from:(a) Epithelial layer of ectoderm in the base of meatus acusticus, (b) Epithelial layer of endoderm on cavum tympanic(c) Medial layer from connective tissue, create stratum fibrosesNose EmbryologyPlakoda of the noseHave invagination; create hole of the noseCreate ridge tissue that circle around each of the hole; form a nose jutIn the edge lateral nasal swellingOut the edge medial nasal swelling

Paranasal Sinuses EmbryologyDevelop as diverticula lateral nasal wallExtends into the maxillary bone, ethmoid bone, frontal bone, and sphenoid boneReached a maximum area at the time of puberty form a fixed face