lung bud

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tracheal bud

the outgrowth from the caudal end of the floor of the respiratory diverticulum.
Farlex Partner Medical Dictionary © Farlex 2012

res·pi·ra·to·ry di·ver·tic·u·lum

(res'pir-ă-tōr-ē dī'vĕr-tik'yū-lŭm)
Primordial pharynx that gives rise to the epithelial lining of the respiratory tract on glands of the bronchial tree.
Synonym(s): lung bud, tracheobronchial diverticulum.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

lung bud

In the embryo, a pouch that grows out of each side of the developing foregut tube beginning at stage 12 (26 days). It pushes into the primitive pleural coeloms and continues to elongate and branch to become the embryonic lung.
See also: bud
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
In rat lung explants, RA significantly increasedthe growth, number of lung buds, and lung area of nitrofen-induced hypoplastic lungs but had no effect on controls (Montedonico et al.
Inhibitory control over Fgf10 involves sprouty (Spry2) and sonic hedgehog (Shh), which are highly diffusible factors secreted by the epithelium of the developing lung bud (Mason et al.
28 days, 4 to 6 mm), the respiratory diverticulum, trachea, and the right and left lung buds are evident.
33 days, 7 to 9 mm), the bronchial tree develops and the lung buds elongate.
This fact supports the idea that congenital lesions, which are usually symptomatic early in life, arise from vestigial bronchi or lung buds. (3)