Are Calcitonin and Thyrocalcitonin Same?

Calcitonin, also called thyrocalcitonin, a protein hormone synthesized and secreted in humans and other mammals primarily by parafollicular cells

(C cells) in the thyroid gland. In birds, fishes, and other nonmammalian vertebrates, calcitonin is secreted by cells of the glandular ultimobranchial bodies.

What is the difference between calcitonin and parathyroid hormone?

Parathyroid hormone acts to increase blood calcium levels, while calcitonin acts to decrease blood calcium levels.

What type of hormone is calcitonin?

Calcitonin is a 32 amino acid hormone secreted by the C-cells of the thyroid gland. Calcitonin has been preserved during the transition from ocean-based life to land dwellers and is phylogenetically older than parathyroid hormone.