Question

The inner lining of blood vessels and heart is ‘tessellated epithelium’, which is-
(a)Simple squamous with a wavy appearance
(b)Simple squamous with the tile-like appearance
(c)Simple cuboidal with a wavy appearance
(d)Simple columnar epithelium

Answer 1

Hint: Tunica intima (endothelium) of the artery will usually appear waived due to the partial constriction of the smooth muscle in the tunica media, the next layer of the blood vessel walls. The epithelium is concerned with filtration and diffusion.

Complete answer:
Based on the number of layers, epithelia are mainly of three forms, plain, stratified, and pseudostratified.
Epithelia are of three forms, squamous, cuboidal, and columnar, depending on the cell shape.
Various variations of the above mentioned six types of epithelia are found in different parts of the body, each serving a specific purpose.
The cells of the squamous epithelium with a wavy contour form what is called the tessellated epithelium. The epithelium lining the blood vessels, for example.

Additional Information: Simple squamous epithelium is found in capillaries, alveoli, glomeruli, and other tissues where rapid diffusion is necessary. The cells are smooth with the flattened, oblong nucleus. It is also called a pavement epithelium because of its tile-like shape. The epithelium is concerned with filtration and diffusion.
Simple cuboidal epithelium is a type of epithelium that consists of a single layer of cuboid (cube-like) cells. These cuboid cells have large, spherical, and central nuclei. Simple cuboidal epithelium is located on the surface of [ovaries], the nephronic lining, the walls of the renal tubules, and parts of the eye and the thyroid gland. The cells conduct secretion and absorption on these surfaces.
A simple columnar epithelium is a single layer of columnar cells attached to the basement membrane, with an oval-shaped nucleus located in the basal area. In humans, plain columnar epithelium lines most of the digestive tract organs, including the stomach, small intestines, and large intestines.
So, the correct answer is ‘simple epithelium with a wavy appearance’.

Note: Simple squamous epithelium is found in capillaries, alveoli, glomeruli, and other tissues where rapid diffusion is necessary. The cells are smooth with flattened, oblong nuclei. It is also called a pavement epithelium because of its tile-like shape. The epithelium is concerned with filtration and diffusion.