Name the endocrine gland that produces calcitonin and mention the role played by this hormone.

(N/A) The endocrine gland that produces calcitonin is the thyroid gland,specifically the parafollicular cells (also known as $C$-cells).
Calcitonin plays a crucial role in calcium homeostasis by lowering blood calcium levels.
It inhibits the activity of osteoclasts,thereby reducing the resorption (dissociation) of $Ca^{++}$ and phosphate from the bones into the blood.