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Type I cells are the larger of the two cell types; they are thin, flat epithelial lining cells (membranous pneumocytes), that form the structure of the alveoli. [3] They are squamous (giving more surface area to each cell) and have long cytoplasmic extensions that cover more than 95% of the alveolar surface.
Malignant club cells are also seen in bronchioalveolar carcinoma of the lung. Serum club cell proteins are used as a biomarker of lung permeability. Exposure to particulate air pollution may compromise the integrity of the lung epithelium and lead to rapid increase in epithelial barrier permeability, as reflected by increased serum club cell ...
Micrograph showing hemosiderin-laden alveolar macrophages, as seen in a pulmonary hemorrhage. H&E stain.. An alveolar macrophage, pulmonary macrophage, (or dust cell) is a type of macrophage, a professional phagocyte, found in the airways and at the level of the alveoli in the lungs, but separated from their walls.
Precision-cut Lung Slices (PCLS) have been instrumental in studying the body's innate responses to viral and, to a lesser extent, bacterial challenges. This system has shed light on which cells become infected within the intact lung, offering insights distinct from in vitro air-liquid interface cultures. [25]
About 20,000 protein coding genes are expressed in human cells and almost 75% of these genes are expressed in the normal lung. [83] [84] A little less than 200 of these genes are more specifically expressed in the lung with less than 20 genes being highly lung specific.
Lung volumes and lung capacities are measures of the volume of air in the lungs at different phases of the respiratory cycle. The average total lung capacity of an adult human male is about 6 litres of air. [1] Tidal breathing is normal, resting breathing; the tidal volume is the volume of air that is inhaled or exhaled in only a single such ...
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Lipid-laden alveolar macrophages in a case of vaping-associated pulmonary injury.Left: Papanicolaou stain; right: Oil Red O stain. [1]Lipid-laden alveolar macrophages, also known as pulmonary foam cells, [2] are cells found in bronchoalveolar lavage (BAL) specimens that consist of macrophages containing deposits of lipids (fats). [3]
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