squamous alveolar cells

(redirected from type I pneumocyte)

squa·mous al·ve·o·lar cells

highly attentuated squamous cells that form the gas-permeable epithelium lining the alveoli of the lungs.
References in periodicals archive ?
Virus antigen expression was seen in many type II pneumocytes, few type I pneumocytes, alveolar macrophages, bronchiolar ciliated and nonciliated epithelial cells, and rare bronchial ciliated epithelial cells.
While the new study found that the 1918 ressortant strains and H5N1 each attacked specialized respiratory cells called pneumocytes, the 1918 chimaraes showed preference for so-called type I pneumocytes, responsible for air exchange in the lungs.
Type I pneumocytes are squamous or flat cells, which are connected together to form the alveolar hexagonal shape.
The immunohistochemical reactivity observed for PCNA and various markers of LAM cells was similar to that found in previous studies,[8-11,13] The type I pneumocytes were unreactive for all these components.
Other cells lining the cystic spaces corresponded to type I pneumocytes, as shown by their larger surface areas, apical surfaces, and absence of microvilli (Figure 3, A).
These type I pneumocytes did not have microvilli, lamellar bodies, or cytoplasmic projections along their basal surfaces (Figure 5, B).