tracheal bud

(redirected from primary lung bud)

tracheal bud

the outgrowth from the caudal end of the floor of the respiratory diverticulum.
References in periodicals archive ?
4) During normal lung development, the primary lung bud receives a vascular plexus from the dorsal aorta which regresses with the development of the main pulmonary artery.
In humans, primary lung buds develop during the fourth week of gestation from the endoderm of the foregut.

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