thyroid hormones diagram

thyroid tsh gland function hormone anatomy t3 t4 vector thyroxine system axis medicine production neuron human endocrinology hypothyroidism healthcare care secretion health illustration endocrine control medical regulation info stimulating biochemistry vital homeostasis iodine diagram neuroendocrine organ triiodothyronine calcitonin hormonal gut heart rate liver lung uterus metabolism design infographic laboratory poster