Normal induced sputum (IS), a model of mucus, is composed of 1 3% solids by weight, including ions, and is thus ∼97 99% water.
Mucus is composed of water, epithelial (surface) cells, dead leukocytes, mucin, and inorganic salts.
The viscosity and water content varies during the menstrual cycle; mucus is composed of around 93% water, reaching 98% at midcycle.
Gut mucosa is composed of a thick secreted mucus layer, a layer of epithelial cells and the underlying nonepithelial tissue, composed of inflammatory cells, connective tissue, and so forth [ 49].
This means that in the samples where mucus can be seen, but no mucins were detected, it is possible that the mucus present is composed mainly of Muc5b, in amounts lower than the sensitivity of our assay.
It is well documented that the inner surface of the stomach is covered by a 170 μm thick mucus layer, which is composed primarily of cross-linked and entangled mucin fibers.
It is composed of water, mucus, proteins, mineral salts, and amylase.
The gut luminal surface is covered by a single layer of epithelial cells, which is composed of absorptive enterocytes, secretory enteroendocrine cells, mucus-producing goblet cells, Paneth cells and a stem cell compartment that assures renewal of all cell lineages.
Mucus is made of material produced by secretory cells and submucosal glands and is composed, primarily, of water (95%), inorganic salts, and macromolecules such as glycoproteins (mucins), lipids, and others (5%) [ 13].
The physical section is composed of a tightly sealed epithelial lining, reinforced by a thick mucus layer produced by goblet cells.
Oceanographers refer to the flaky debris as "marine snow": it is composed of decaying bodies, microscopic algae and slimy goo from gelatinous animals that use mucus nets to gather food.
