mjl1717 Forum Hero

Topics: 959 Posts: 5,467
| | 07/03/04 - 11:50 AM  
 
|   #2 |
All I found was: tympanic cavity-(middle air) and tympanic membrane- arising from( pharyngeal membrane 1) which consist of ectoderm, mesoderm and endoderm of pharyngeal pouch 1 The middle ear consist of the three ossicles, the tympanic membrane and the eustachian tube. The tympanic membrane separates the middle ear from the external ear, :arrow: it is derived from all 3 germ layers. Hope this helps addendum: always remember: around week 3 "Neural plate"-neural groove-neural folds-neural tube/ the neural folds are the sites of neural crest differentiation(neural crest are unique in that they can form non- neural components
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| mash Forum Fanatic
Topics: 147 Posts: 1,326
| | 07/03/04 - 12:14 PM  
 
|   #3 |
tympanic plate forms the superior wall of tympanic antrum(is aka tegmen tympani) and separates it frm MCF of base of skull it appears at or just b4 the birth and its development completes by puberty
___________________ I hear and I forget. I see and I remember. I do and I understand. --Confucius
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