Bronchus Segmentalis (histological specimen)


 * The bronchi resemble the trachea in some ways - again we find hyaline cartilage (but already quite irregular in shape), smooth muscle cells, seromucinous glands. Lung tissue (or pulmonary alveoli) may be located outside the bronchi on larger sections.
 * The epithelium is multilinear cylindrical with lashes (as in most places in the respiratory tract).
 * Lamina propria (vessels, seromucinous glands and a little smooth muscle).
 * Smooth muscle causes a postmortem contraction of the wall, so the mucosa is folded into small algae (it regulates the patency of the bronchi during life).
 * Hyaline cartilage coated with perichondria.

Související články

 * Astma
 * Bronchiolitis