embriologi telinga, hidung, sinus paranasal.pptx
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Embryology of Ear, Nose, and
Paranasal Sinuses
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Ear Embryology
Internal ear
Medial ear
External ear
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Internal Ear
Otokista
In embryo aged + 22 day
Thickness of ectoderms surface in both of
rombencephalon side (Plakoda Ear) Invagination quickly; form otokista
Divided into:
o Ventral unsure: sacculus and ductus cochlearis
o Dorsal unsure: utriculus, canalis semicircularis,
and ductus endolymphaticus.
Structure of epithelial is form : membranose maze
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Medial Ear
Cavum tympanicFrom endoderm; from first sac pharynx
Grow quickly to lateral side; stick to the first floor ofthe cleft of the pharynx
Distal part (recessus tubotympanicus) : wide andform cavum tympanic primitive
Procsimal part : remains narrow and form audivitatube (Eustachius tube)
Osikula audicuso Malleus and incus from the first arch cartilage
pharynx
o Stapes from the second arch cartilage pharynx
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External Ear
Auricula
From six mesenchymal proliferation
In the dorsal end of the first and second pharyngeal arch
Meatus Acusticus Externus From dorsal part of the first pharyngeal cleft
Beginning of third month epithelial cells proliferate at the
bottom of this hole
Membranose Tympanic Created 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 fibroses
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Nose Embryology
Plakoda of the nose
Have invagination; create hole of the nose
Create ridge tissue that circle around eachof the hole; form a nose jut
In the edge lateral nasal swelling
Out the edge medial nasal swelling
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Paranasal Sinuses Embryology
Develop as diverticula lateral nasal wall
Extends into the maxillary bone, ethmoid
bone, frontal bone, and sphenoid bone
Reached a maximum area at the time of
puberty form a fixed face