The endocrine system is a control system 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.

Animal anatomy | Endocrinology | Organ systems

Ендокринна система | Kategorie:Endokrinní žlázy | Catégorie:Système endocrinien | Kategori:Endokrin sistem | Thể loại:Hệ nội tiết | Category:內分泌系統