Tuesday, 6 May 2014

Lung development

Lung development: REMEMBER  the sequence as Entering [Embryonic], Professional [Pseudoglandular], Course [Canalicular],  So [Saccular] Amazing [Alveolar]....
--Develops from median diverticulum of foregut, lining epithelium is endodermal origin.
Stages:-
5 overlapping stages
1.Embryonic –D26-7thwk- lung buds.
2.Pseudo glandular-5thwk-16thwk-Terminal bronchiole.
3.Canalicular-16th-26thwk-Alv.duct.
4.Saccular-26thw-birth-Primitive alveoli.
5.Alveolar-36w-18m-Prominent alveoli.

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