8.5 POJA-L362
Title: Bronchiole in the lung Description: Stain Azan, adult human. The lumen is lined with one layer of ciliated epithelium (1) without goblet cells. Patches of smooth muscle fibers (2) are present. Notice small bronchial arteries (*). Arrows (↓) indicate sites of carbon accumulations between the alveoli (3). |
8.5 POJA-L369
Title: Respiratory bronchiole Description: Stain hematoxylin-eosin, human. A longitudinal section shows the lumen of a respiratory bronchiole (1) with an irregular lining. It is covered by low columnar - cuboidal cells, a few pouches within the same lumen are lined by thin alveolar epithelium as found in the surrounding alveoli (2). Thin arrows (→) point to light-stained Clara cells. At (3) more or less continuous bundles of smooth muscle (at this level individual differences appear depending on among others age, health). At (4) area with discontinuous muscle bundles. (5) indicates pulmonary arteries. Note that most capillaries (c, c, c,c) within the extensive vascularized alveolar walls are dilated. Keywords/Mesh: respiratory tract, lung, bronchiole, respiratory bronchiole, columnar epithelium, cuboidal epithelium, ciliated epithelium, smooth muscle, Clara cell, alveolar epithelium, alveolus, histology, POJA collection |