Question

Which epithelial cells cover the lining of the mouth and esophagus?
(a). Cuboidal
(b). Ciliated
(c). Squamous
(d). None of the above

Answer 1

Hint: It is found in an assortment of areas, beginning from vessels to the alveoli of lungs, and nephrons of kidneys. Most of those cells arise from the ectoderm or outermost layer of cells within the embryo. However, some tissues are also derived from the mesoderm or middle layer of embryonic cells.

Complete step by step answer
The simple squamous cells have the appearance of thin, flat plates. The shape of the nucleus usually corresponds to the cell form and helps to spot the sort of epithelium. Squamous cells, for instance, tend to possess horizontally flattened, elliptical nuclei due to the skinny flattened sort of the cell. They form the liner of cavities like the mouth, blood vessels, heart, and lungs and structure the outer layers of the skin.

Additional information
Since this epithelium is shaped by one layer of thin cells that are firmly stuffed together, it's the ideal mode for particular transmembrane transport. Some substances, like oxygen from the lungs, travel mostly along their concentration gradient towards the blood. Others are actively transported using membrane-bound carrier proteins.
Film proteins are engaged with framing tight intersections to guarantee that the development of particles, gases, little atoms, or water happens just through the cell and there is no diffusion or osmosis through the interstitial spaces. The remainder of the plasma film makes up the basolateral surface.

So the correct answer is ‘Squamous’.

Note: These epithelia are common where absorption or transport of materials is important. They additionally assume a function in dissemination, assimilation, and filtration. This makes them significant in the kidney, in the alveoli of the lungs, and in the dividers of vessels.
Air enters the body through the nostrils and goes through a progression of cylindrical structures, for example, the pharynx, larynx, windpipe, and the fanning organization of bronchi to end in alveoli.