Endocrine gland
The adrenal glands are located above the kidneys in humans and in front of the kidneys in other animals. The adrenal glands produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. It controls the behaviour during crisis and emotional situations. It stimulates the heart and its conducting tissues and metabolic processes.
Preorbital gland
Deer have seven major external scent glands, distributed throughout their bodies. These glands are the forehead glands (located on the forehead), the preorbital glands (located below the eyes), the nasal glands (located inside the nostrils), the interdigital glands (located between the toes), the preputial gland (located inside the foreskin of the deer's penis), the metatarsal glands (located outside of the hind legs), and the tarsal glands (located inside of the hind legs). Though it is not their primary function, the salivary glands also function as scent glands. Deer rely heavily on these scent glands to communicate with other members of their species, and possibly even with members of other species. A deer may rub its preorbital gland (e.g., on a branch) purely for pleasure.