* Ectoderm: Forms the outer layer of the embryo and gives rise to epithelial tissues like the epidermis (outer skin layer), lining of the mouth and anus, and parts of the nervous system.

* Mesoderm: Forms the middle layer of the embryo and gives rise to epithelial tissues like the lining of blood vessels, body cavities (peritoneum, pleura, pericardium), and the epithelial parts of the kidneys and gonads.

* Endoderm: Forms the inner layer of the embryo and gives rise to epithelial tissues like the lining of the digestive tract, respiratory tract, and urinary bladder.

So, depending on the specific location and function of the epithelial tissue in the body, it can be derived from any of the three germ layers.