What type of tissue lines the follicles thyroid glands?

The follicles of thyroid glands are lined by a simple cuboidal epithelium. Simple cuboidal epithelium is composed of a single layer of cube-shaped cells. The cells are closely packed together and have a large, round nucleus. This type of epithelium is found in many different organs in the body, including the thyroid gland, pancreas, and salivary glands.