Lung-nontumor
General
Embryology

Authors: Elliot Weisenberg, M.D. (see Authors page)

Revised: 11 July 2016, last major update August 2011

Copyright: (c) 2003-2016, PathologyOutlines.com, Inc.

PubMed search: Embryology[title] lung
Definition / General
  • The lungs develop from the ventral wall of the foregut
  • The midline trachea develops two lateral outpouchings, the right and left lung buds
  • The lung buds extend into primitive thoracic mesenchyme that becomes bronchial cartilage and other connective tissue
  • The right lung bud develops three branches that become mainstem bronchi, the left lung bud develops two branches that become mainstem bronchi
  • The phases of lung development are embryonic (3 1/2 to 6 weeks), pseudoglandular (6 to 16 weeks), canalicular (16 to 28 weeks), saccular (28 to 36 weeks) and alveolar (36 weeks to term)
Diagrams / Tables

Images hosted on other servers:

Various images

Micro Images

Images hosted on PathOut server:

Contributed by Dr. Grigory Demyashkin, I. M. Sechenov First Moscow State Medical University (Russia) - 6-8 week embryo:

Lung, glandular stage

Lung, glandular stage; top: spine

Top: spine; lower left: trachea & esophagus; center: lung, glandular stage