Anatomy of the Parathyroid GlandParathyroid glands grown from endoderm tissue, ie, the 3rd as well as quaternary pharyngeus sulcus. Parathyroid glands from iv pharyngeus sulcus tend to unite amongst the upper pole of the thyroid gland, parathyroid glands that degree the cranial. Glands from 3rd pharyngeus sulcus is component division of caudal parathyroid glands, which are sometimes fused amongst the lower pole of thyroid. However, the lay is oft highly variable. Caudal percentage of the parathyroid glands tin give the sack hold upward flora inwards the posterolateral lower pole of the thyroid gland, or inwards the thymus, fifty-fifty inwards the mediastinum. Parathyroid glands sometimes flora inwards the thyroid gland parenchyma. (R. Sjamsuhidajat, Wim de Jong, 2004, 695)
Normally at that spot are iv parathyroid glands inwards humans, which is located simply behind the thyroid gland, 2 embedded inwards the superior pole of the thyroid gland as well as 2 inwards the inferior pole. However, the place of each of the parathyroid as well as the numbers tin give the sack hold upward quite varied, parathyroid tissue is sometimes flora inwards the mediastinum.
Each of the parathyroid glands are about half-dozen millimeters, 3 millimeters broad as well as 2 millimeters thick as well as has a blackish brownish fatty macroscopic picture. Parathyroid gland contains mainly the adult primary cells (chief cells) containing Golgi apparatus hitting addition the endoplasmic reticulum as well as secretory granules that synthesize as well as secrete parathyroid hormone (PTH). Tues oksifil fewer but larger granules containing oksifil as well as a large number of mitochondria inwards the cytoplasm In humans, earlier puberty is exclusively rarely found, as well as after that the number of these cells increases amongst age, but the bulk of immature animals as well as humans, the jail cellphone is non flora oksifil . Oksifil jail cellphone business office is nonetheless unclear, these cells may hold upward modified or the balance of the main cells that no longer secrete diverse hormones.
Physiology of the Parathyroid Gland
Parathyroid glands secrete parathyroid hormone (PTH), which together amongst Vitamin D3, as well as calcitonin regulate calcium levels inwards the blood. PTH synthesis is controlled past times the plasma calcium levels, which inhibited the synthesis when high calcium levels as well as stimulated when calcium levels are low. PTH stimulates renal tubular reabsorption of calcium, increases the absorption of calcium inwards the small-scale intestine, whereas inhibiting reabsorption of phosphate as well as calcium unloosen from bone. So PTH volition actively operate on 3 major target signal inside the command of calcium homeostasis inwards the kidney, os as well as intestine. (R. Sjamsuhidayat, Wim de Jong, 2004, 695) Sumber http://nanda-nursinginterventions.blogspot.com/