The endocrine system is a system of ductless glands that secrete chemicals 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.
Glands involved and the hormones secreted:
In both sexes:
(starting from the head and going downwards)
thyroid gland (thyroid hormones is a good writeup)
stomach and intestines
Islets of Langerhans in the pancreas