The adrenal medulla is the centrally located part of the adrenal gland surrounded by the adrenal cortex.
It contains chromaffin cells, which secrete two hormones adrenaline and noradrenaline.
The adrenal medulla, the inner part of an adrenal gland, controls hormones that initiate the flight or fight response.
The main hormones secreted by the adrenal medulla include epinephrine (adrenaline) and norepinephrine (noradrenaline), which have complementary functions.