mascot style of pituitary standing with holding a clock

adrenal adrenocorticotropin alarm anatomy biology cartoon character chemistry clock concentration corticotropin cortisol cute education emoticon emotion endocrine endocrinologist endocrinology expression function funny happy hormonal hormone hour hourglass human hypothalamic hypothalamus illustration mascot medical medicine norepinephrine pituitary science scientific secretion smile structure system testosterone ticker time timepiece timer vector wait waiting