Simply put, a simple cuboidal epithelium is an epithelium that is composed of cuboidal epithelial cells. The cuboidal epithelial cells have a cuboidal form, as implied by their name, which indicates that they are nearly as broad as they are tall in proportion to their size.
If you look at these cells from above, they have a square form. Furthermore, nucleus is frequently located in the middle of each cell, and it is big and spherical in shape.

Besides, the simple cuboidal epithelium is primarily engaged in the processes of secretion, absorption, and excretion of substances.
The surface of the ovaries, salivary glands, sections of the eye, thyroid gland, pancreas, the lining of the nephrons, and the walls of the renal tubules are all examples of this kind of tissue.

Transitional epithelium is a form of stratified epithelium composed of numerous layers of cells whose shape varies depending on the function of the organ.
When in a relaxed condition, the epithelium appears cubical or spherical, with the exception of the apical layer, which appears flattened when the epithelium is stretched.
This epithelium is almost exclusively found in the urinary system, which is why it is often referred to as “urothelium.”

Ciliated Epithelium is a thin tissue that contains hair-like structures on it called cilia that are important for transporting particles out of our body. Ciliated Epithelium is also known as ciliated epithelium or ciliated epithelium. Ciliates epithelial tissue may be found in our respiratory system as well as in the fallopian tubes of females.