This gland is located just above the thyroid gland, 4 tiny parathyroids can be found above the posterior of thyroid to be exact. It regulates PTH or parathyroid hormone which works to increase blood calcium, stimulate bone resorption by osteoclasts, release calcium into the bloodstream, to stimulate kidneys to conserve calcium, and to cause an increased absorption of calcium in the intestines, and all of this is regulated by negative feedback loops. Basically, PTH helps maintain proper blood calcium along with calcitonin