The parathyroid gland is located at the back of the thyroid gland, positioned with two glands on each side. It is responsible for making PTH which maintains calcium and potassium levels in the blood.
References
professional, Cleveland Clinic medical. “Parathyroid Hormone: What It Is, Function & Levels.” Cleveland Clinic, my.clevelandclinic.org/health/articles/22355-parathyroid-hormone. Accessed 1 Dec. 2023.