Wednesday, 12 February 2014

LARYNX&TRACHEOBRONCHI


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AL TREE
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4th wk laryngo tracheal tube- cranial portion forms larynx n trachea,caudal- right n left tracheal buds
caudal part of hypobr eminence-epiglottis
Laryn mucosa-endoderm
Laryn cartilage-mesenchyme
Arytenoid n corniculate-6th arch
Cuneiform-derivative of epigl
Thyroid-4th branchial arch
Cricoid&tracheal cartilage-6th arch-6wks
Bronchial tree fully dev at 6-10wks
Upper part of thy cart-4th arch
6th arch
🔹Lower part of thy cart
🔹Cricoid
🔹Corniculate cuneiform
🔹Intrinsic muscles of larynx
2nd arch
🔹Upper part of body of hyoid
🔹Lesser cornua
🔹Stylohyoid lig
3rd arch
🔹Lower part of body of hyoid
🔹Greater cornua
Alveoli develops after birth upto 8yrs
vocal cord
🔹Childhood-6mm n female,8mm in male
🔹adults-15-19mm female,17-23mm male

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