تصنيف:جهاز الغدد الصماء

جهاز الغدد الصماء هو جهاز تحكم في of ductless endocrine glands that secrete chemical messengers called hormones that circulate within the body via the bloodstream to affect distant organs. It does not include exocrine glands such as salivary glands, sweat glands and glands within the gastrointestinal tract.