thyroid hormones diagram

thyroid gland vector t3 t4 tsh trh anatomy hormone endocrine endocrinologist system goiter illustration health function endocrinology medical diagram human thyroxine organ anatomical internal medicine hormonal hypothalamus action pituitary hyperthyroidism hypothyroidism feedback healthcare awareness cancer month disease iodine calcitonin calcium thyrotropin brain triiodothyronine blood vessel metabolism infographic clinic design info