Calcitonin: This hormone works opposite to parathyroid hormone, it lowers blood calcium levels by storing it in bones.
Osteoporosis:A condition characterized by weak and brittle bones due to loss of bone mass which can be caused by imbalance in regulation of calcium.
Endocrine Glands:These are ductless glands that secrete hormones directly into the bloodstream. The thyroid and parathyroid glands are examples of endocrine glands.