Cuboidal epithelium is a type of epithelial tissue composed of cube-shaped cells. This tissue is typically found in glands, ducts, and the lining of certain organs, such as the kidneys. Its primary functions include secretion and absorption, making it essential for various physiological processes. The cells in cuboidal epithelium are usually arranged in a single layer, providing a protective barrier while allowing for efficient exchange of materials. This structure is crucial in organs like the thyroid gland and salivary glands, where it plays a vital role in producing hormones and saliva, respectively.