alveolar cell


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

al·ve·o·lar cell

any of the cells lining the alveoli of the lung, including the squamous alveolar cells, the great alveolar cells, and the alveolar macrophages.
Synonym(s): pneumocyte

alveolar cell

A nonspecific term for any cell native to the pulmonary alveoli—e.g., type-I and type-II pneumocytes and alveolar macrophages.

al·ve·o·lar cell

(al-vē'ŏ-lăr sel)
Any of the cells lining the alveoli of the lung, including the squamous alveolar cells, the great alveolar cells, and the alveolar macrophages.

alveolar cell

1. In the lung, either of two types of epithelial cells lining the alveoli. Type I cells are simple thin squamous epithelial cells. Type II cells secrete pulmonary surfactant. Type II cells are smaller and more numerous than Type I cells.
2. In the mammary glands, the milk-secreting epithelial cells, which are activated during lactation.
See also: cell
References in periodicals archive ?
Alveolar cell carcinoma of the lungs: the first report of a case in Egypt and review of the literature.
Indeed, these three NOS isoforms were highly expressed in alveolar cells in the lung tissue of urethane-injected mice.
Alcian blue stains acid mucosubstances and acetic mucins.[8] Because type II alveolar cells secrete surfactant, the majority of which is dipalmitoylphosphatidylcholine, the alcian blue dye will give a blue color to mucopolysaccahrides present in or on the cells.
Comparison of mitochondria density and average volume of type II alveolar cells in fetal rats of four groups showed that the mitochondria density intype II alveolar cells of Group A (20.44 [+ or -] 4.99 [micro][m.sup.-3]) was significantly lower than that of Group B (31.46 [+ or -] 3.45 [micro][m.sup.-3]), P < 0.01; the density between Group B and Group C had no statistical difference, P > 0.05.
Figure 2 summarizes the signaling effects mediated by the various alveolar cells in response to xenobiotic exposure.
Differentiation of MSCs into epithelial type II cells may partially restore the stem cell pool, leading to increased genesis of alveolar cells for the resolution of disrupted alveolar surfaces, thereby augmenting the repair process.
Among other complications, tobacco smoke down regulates vascular endothelial growth factor, which is required for the growth and survival of endothelial and alveolar cells. Tobacco smoke also increases the numbers of neutrophil elastase and macrophage proteinases in the lungs of smokers.
In rats exposed to BNF alone, Bax was rarely expressed (Figure 2C), but it was frequently expressed in alveolar cells from rats exposed to CD and BNF (Figure 2D).
The scatterers are alveolar cells in the barbs of the feathers.
TAZ expression levels in the alveolar cells of NSIP cellular-type patients tended to be higher than those of the fibrotic-type patients, but the difference was not statistically significant [Figure 1]c.
With respect to ultrastructural histopathologic changes by electron microscopy, Type I alveolar cells were characterized by vacuolation, degranulation, mitochondrial swelling, perinuclear cisterna dilation, and rough endoplasmic reticulum pool after inhalation injury, while Type II alveolar epithelial cells were typically characterized by vacuolation of lamellar bodies and exfoliated tubular myelin.