ANATOMY

Detailed explanation-1: -Four small masses of epithelial tissue are embedded in the connective tissue capsule on the posterior surface of the thyroid glands. These are parathyroid glands, and they secrete parathyroid hormone or parathormone. Parathyroid hormone is the most important regulator of blood calcium levels.

Detailed explanation-2: -Anatomy Overview In its anatomic position, the thyroid gland lies posterior to the sternothyroid and sternohyoid muscles, wrapping around the cricoid cartilage and tracheal rings.

Detailed explanation-3: -The parathyroid glands are often directly adjacent to and/or located within the thyroid glands. The parathyroid glands are surrounded by a thin capsule, and separated into lobules via thin fibrous septa.

Detailed explanation-4: -Parathyroid hormone comes from four parathyroid glands in the neck, just behind the thyroid. These glands receive feedback from blood calcium levels to determine when they need to secrete the hormone.

Detailed explanation-5: -The parathyroid glands lie just behind the thyroid glands in the neck. The parathyroid glands (light pink) produce parathyroid hormone, which increases levels of calcium in the blood. The parathyroid glands are small pea-sized glands located in the neck just behind the butterfly-shaped thyroid gland.