Lung, bronchiole and alveoli with blood
The bronchiole passing across the lower left lies adjacent to several alveoli. Bronchioles typically have simple cuboidal epithelium, in contrast to the simple squamous epithelium of alveoli. Different types of bronchiolar cells (ciliated and secretory) cannot be readily distinguished in this image.
Blood has been retained in blood vessels, so the conspicuous presence of red blood cells serves to reveal the location of alveolar capillaries.
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Last updated: 27 May 2022 / dgk