File:Respiratorysystem2.png

From Embryology

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Lower Respiratory Tract

A drawing depicting basic features of the human lower respiratory tract including the thyroid cartilage, rib cage and diaphragm. To reveal the internal structures of the left lung, the skeletal structures and heart have been removed and the left lung has been sectioned in the coronal plane.

Summary

Below are the zones and their contributing structures along with where their originated from.

Conducting zone

  • Oral Cavity -Stomodeum
  • Larynx - Endoderm
  • Trachea - Splanchnic Mesoderm
  • Bronchi -Mesoderm giving rise to mesenchyme

Respiratory Zone

  • Terminal Bronchioles - Endoderm giving rise to Squamous epithelium
  • Alveoli ducts - Endoderm
  • Alveoli - Endoderm

Bones and Muscles

  • Bones - Ectoderm
  • Diaphragm - Splanchnic mesoderm as the autonomic nervous system controls the diaphragm
  • Intercostal Muscles - Mesoderm

Reference

Bibliography Netter, F. (2011). Atlas of human anatomy. Philadelphia, PA: Saunders/Elsevier.

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--Mark Hill (talk) 10:02, 8 November 2014 (EST) Assessment - this is an excellent student drawing, I have not seen the original so I cannot comment on than aspect. You have also put good information here in the caption. Note that embryonically endoderm does line the entire tract and form the epithelium along its length, so your originating structures are a little simplified. I would also have liked to see a better file name.


Note - This image was originally uploaded as part of an undergraduate science student project and may contain inaccuracies in either description or acknowledgements. Students have been advised in writing concerning the reuse of content and may accidentally have misunderstood the original terms of use. If image reuse on this non-commercial educational site infringes your existing copyright, please contact the site editor for immediate removal.

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Date/TimeThumbnailDimensionsUserComment
current13:49, 24 October 2014Thumbnail for version as of 13:49, 24 October 2014645 × 575 (403 KB)Z3333429 (talk | contribs)==Lower Respiratory Tract== A drawing depicting basic features of the human lower respiratory tract including the thyroid cartilage, rib cage and diaphragm. To reveal the internal structures of the left lung, the skeletal structures and heart have been...

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