Exocrine is a gland that has ducts that secretes it products into other organs or onto the body surface (like sweat)
Endocrine is a ductless gland that secretes hormones into the bloodstreams (like...
The adrenal glands are endocrine glands. Endo means "in". Exo means "out". So adreanal glands are endocrine glands because the hormones they produce work in the body and not out.