Anatomically they are localized on the surface of each side of the thyroid (Figure 9-5) and total ~120 mg of tissue.The parathyroid glands are derived from the endoderm of the third and fourth pharyngeal pouches. -1-2 cm inferior to the lower poles of the thyroid. They are derived from the third and fourth pharyngeal pouches. Parathyroid glands have been identified in all vertebrate species higher than fish. posterior medial Which one of the following structures lies medial to the left thyroid lobe? Embedded in the lobes of the thyroid gland. -Superior parathyroid-adjacent to the posterior aspect of the midportion of the thyroid. The parathyroid glands are attached to the thyroid, but despite the similar names, they play a different role. The parathyroid glands are normally located on the _____ surface of the thyroid gland. 2. Four parathyroid glands are nestled behind the thyroid gland (two on each side) and are covered with the same fascial capsule as the thyroid. The parathyroid glands are four, oval-shaped endocrine glands located on the posterior surface of the thyroid gland. -Inferior parathyroid-variable, but closer to the lower poles of the thyroid. The parathyroids are usually located on the back surface of the thyroid, in the portion of the neck between the Adam’s apple and the collarbone. Organized in follicles The two higher glands, one on each side, are known as the superior parathyroid glands, while the two lower glands are known as the inferior parathyroid glands. Figure 8-6 Parathyroid glands (posterior view). Secretes thyroid hormones 3. The top two superior parathyroid glands are located at the level of the bottom of the cricoid cartilage. Human parathyroid glands are embedded in the anterior (frontal) surface of the thyroid gland. The parathyroid glands receive their arterial supply from the inferior … The inferior parathyroid glands are … Secretes PTH 4. Indicate whether each statement is true or false regarding the structure and location of the parathyroid gland. 1-3% of adenomas are in atypical locations, name them. Calcium Metabolism Calcium balance is required not only for the health of bones and teeth but also for the proper function of the nervous system and muscles. Where are typical locations of adenomas? There are normally four parathyroid glands. The four small parathyroid glands are embedded in the posterior surface of the thyroid. 1. In humans there are normally four parathyroid glands.