Question

Epithelial tissue arise from
A: Ectoderm
B: Endoderm
C: Mesoderm
D: All of the above

Answer 1

Hint: Epithelial cells are the types of cells that line almost all the surface of the body. It is characterised by the densely packed cells together with minimal intercellular surface and firmly attached intercellular junctions. These types of cells are found in the kidney, skin, blood vessels, urinary tract and other organs. Epithelial tissue is formed from the embryological germ layers.

Complete answer:
There are four types of tissue that include connective tissue, epithelial tissue, muscle tissue and nervous tissue.
> Epithelial tissue is the tissue that is widespread throughout the body and covering almost all the body cavities, lining and organs are called as epithelial tissue.
> Epithelial tissues do not have any blood vessels, they usually get nourishment from the connective tissue.
> It normally rests on the basement membrane.
> The main function of epithelial tissue is protection, secretion, absorption, excretion, filtration, diffusion.
> The epithelial tissue is derived from all the embryological germ layers that include ectoderm, endoderm and mesoderm.
> Ectoderm is the most exterior out of these three germ layers. It form the epidermis which is outermost layers of the skin
> Mesoderm forms the middle layer of the all germ layer. It forms the membrane of the alimentary canal.
> Endoderm is the inner layer and it forms the inner linings of the body cavities.

Hence, the correct option is option D. All of the above.

Note:
Epithelial tissues are spread throughout the body that covers almost all the body. It is found in the kidney, skin, blood vessels and urinary tract. It rests on the basement membrane. The epithelial tissue is derived from all the germ layers that is ectoderm, mesoderm and endoderm. Ectoderm forms the epidermis which is the outermost of the skin, mesoderm forms the mesothelial lining and endoderm forms the inner lining of the body cavities.