1 Muscle twitching of one arm and Muscle symptoms (4 causes). 2  Muscle twitching of one arm and Muscle twitching in children (4 causes). 3  Muscle twitching of one arm and Muscle weakness (4 causes). 4  Muscle twitching of one arm and Musculoskeletal symptoms (4 causes).
Parathyroid hormone is secreted by the parathyroid glands and is the most important regulator of calcium levels in the blood and within the bones.Alternative names for parathyroid hormone PTH; parathormone; parathyrin.arathyroid hormone is secreted by the parathyroid glands and is the most important regulator of calcium levels in the blood and within the bones. Alternative names for parathyroid hormone PTH; parathormone; parathyrin.
1 They secrete parathyroid hormone which regulates calcium levels in the blood. 2  Thymus. 3  Although it is considered an endocrine gland, the thymus gland is the main organ of the lymphatic system. 4  Its primary function is to promote the development of specific white blood cells called T-lymphocytes. Thyroid and Parathyroid Glands. 2  The thyroid is a dual lobed gland located in the neck region. 3  It secretes hormones that control metabolism, growth, heart rate, body temperature, and regulate calcium levels. 4  Hormones secreted by the thyroid include thyroxin, triiodothyronine, and calcitonin.