Stephen J. Schueler, M.D.

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Moraxella Pneumonia Anatomy

To better understand Moraxella pneumonia, it helps to understand the anatomy of the lungs.

Inside the chest, the windpipe, or trachea, divides into two smaller tubes: the right bronchus and the left bronchus. The right bronchus enters the right lung and the left bronchus enters the left lung. The right bronchus and left bronchus branch into smaller and smaller tubes.

The smallest tubes, called bronchioles, end in tiny air sacs, called alveoli. Blood flows very close to the walls of the alveoli. Oxygen and carbon dioxide pass between the air and the bloodstream through the wall of the alveoli.

Anatomy examples:

  • The lung and airways
  • The bronchioles and alveoli
  • The lungs

Last Updated: Apr 22, 2009 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Moraxella Pneumonia References
  1. Apisarnthanarak A, Mundy LM. Etiology of community-acquired pneumonia. Clin Chest Med. 2005 Mar;26(1):47-55. [15802165]
  2. Verduin CM, Hol C, Fleer A, van Dijk H, van Belkum A. Moraxella catarrhalis: from emerging to established pathogen. Clin Microbiol Rev. 2002 Jan;15(1):125-44. [11781271]
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