a cute picture of grinning pituitary caricature character

adrenal adrenocorticotropin anatomy beam biology cartoon character chemistry concentration corticotropin cortisol cute education emoticon emotion endocrine endocrinologist endocrinology expression function funny grin grinning happiness happy hormonal hormone human hypothalamic hypothalamus illustration joyful laugh mascot medical medicine mug norepinephrine pituitary science scientific secretion shine smile smirk sneer structure system testosterone vector