Parathyroid Gland

The Parathryoid Gland has chief principal cells that produce parathyroid hormone (PTH), and oxyphil or acidophilic cells that have no known function, may be intermediate cells. PTH works on bone osteoclasts by stimulating the resorption of mineralized bone. In uriniferous tubules, it stimulates the reabsorption of Ca2+ and activates the production of active vitamin D.