lung bud

(redirected from Respiratory diverticulum)
Also found in: Medical.

lung bud

[′ləŋ ‚bəd]
(embryology)
A primary outgrowth of the embryonic trachea; the anlage of a primary bronchus and all its branches.
References in periodicals archive ?
In the embryogenesis of the foregut, a respiratory diverticulum appears at the ventral wall of the pharyngeal gut at 4 weeks.
At the 4th week of development, the respiratory diverticulum (tracheobronchial diverticulum) appears at the ventral wall of the foregut.
Tracheal development begins during the fourth week of life, when the respiratory diverticulum branches off of the foregut mesenchyme.
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