(1) Within the neck, there are neck muscles, arteries, veins, lymph glands, thyroid gland, parathyroid gland, oesophagus, larynx and trachea.(2) The larynx, thyroid, and parathyroid glands were also encased by the sclerotic, yellow tissue.(3) parathyroid tissue(4) The major glands that make up the human endocrine system are the hypothalamus, pituitary, thyroid, parathyroids , adrenals, pineal body, and the reproductive glands, which include the ovaries and testes.(5) In practice, however, endocrine pathology has been traditionally more narrowly defined as the subspecialty that deals with the major endocrine organs, such as the thyroid, parathyroids , pancreas, and adrenal glands.(6) When the human body is deficient in vitamin D because of reduced dietary intake or inadequate exposure to sunlight, the parathyroid hormone mobilizes calcium from its stores in the skeleton to restore calcium balance in the blood.
