Mastic Carvedwood Siding Colors. Description: Mastic Carvedwood 44 is a a cedar lap siding that is available in 6 different profiles, 2 finishes that includes smooth and wood grain and 26 colors selections.
These folds give the stomach its well-known ability to enlarge when engorged with food. On the outermost layer of these folds you may see a thin line of material. This is mucus which helps protect the tissues below from the harsh environment of the stomach. The innermost layer is a lining of simple columnar epithelium (labeled in the high magnification image). This type of epithelium provides the greatest surface area for abosrption or secretion. In the stomach the epithelial cells exposed to the lumen are primarily constructed to resist digestion by the lumen contents. The epithelial layer forms depressions called gastric glands or pits. Within these pits are mucous secreting cells, parietal cells which secrete HCL, and chief cells which secrete pepsinogen.
Cuboidal epithelial cells, as their name suggest, are shaped like cubes. These are typically found in tissues that secrete or absorb substances, such as in the kidneys and glands. Columnar epithelial cells are long and thin, like columns.These are usually found in places that secrete mucus such as the stomach.They can also specialize to receive sensory information in places like taste buds on your tongue and inside of your nose.olumnar epithelial cells are long and thin, like columns. These are usually found in places that secrete mucus such as the stomach. They can also specialize to receive sensory information in places like taste buds on your tongue and inside of your nose.