uwl-280-145
FredsButton
FredsButton
FredsButton
FredsButton
FredsButton
FredsButton
FredsButton
FredsBanner

  Large bronchiole c.s.

Unit_14-05a
FredsButton FredsButton

 1. Lumen of the bronchiole

 2. Ciliated columnar epithelium

 3. Smooth muscle layer

Close-Up View of a Bronchiole

FredsLine

This image shows a cross section of a terminal bronchiole.  Within the lung, tertiary bronchi become progressively smaller and eventually form small airways called terminal bronchioles.  Note that this  bronchiole is lined with a thick layer of ciliated columnar epithelium whose cilia help to remove  foreign debris from the lungs.  A thin (but complete) layer of smooth muscle that can regulate  the diameter of the bronchiole can also be seen. 

FredsLine