10/16/2026
The parathyroid glands are typically four tiny, oval-shaped endocrine glands located on the posterior surface of the thyroid gland in the neck, playing a vital role in regulating calcium and phosphate levels in the body. 🧬 These glands contain specialized chief cells that secrete parathyroid hormone (PTH), which helps increase blood calcium levels by stimulating calcium release from bones, enhancing calcium reabsorption in the kidneys, and promoting intestinal calcium absorption through vitamin D activation. Understanding parathyroid gland anatomy and function is essential for studying the endocrine system, bone metabolism, nerve signaling, muscle contraction, and disorders such as hyperparathyroidism and hypoparathyroidism.