Some different types of hormones are thyrotropin-releasing hormone, growth hormone, oxytocin, thyroxine, calcitonin and insulin. Hormones are released from various endocrine glands to serve different functions in the body.
Thyrotropin-releasing hormone is excreted by the hypothalamus and stimulates the release of thyroid releasing hormone.
Growth hormone is released by the anterior pituitary gland and signals the growth of the organs and bones.
Oxytocin is given out by the posterior pituitary and causes contractions of the uterus during childbirth.
Thyroxine, released by the thyroid gland, helps regulate the body's metabolism.
Calcitonin is excreted by the parathyroid glands so that it can lower a person's blood calcium levels when they are too high.
Insulin is expelled by the pancreas to lower the levels of glucose in the blood.