a cheerful pituitary cartoon concept having a box

adrenal adrenocorticotropin anatomy biology box cardboard cartoon character chemistry concentration corticotropin cortisol courier cute delivery distribution education emoticon emotion endocrine endocrinologist endocrinology expression funny gift happy hormonal hormone human hypothalamic hypothalamus illustration mailing mascot medical medicine norepinephrine package pituitary post science scientific secretion send shipment smile structure system testosterone vector