Adrenal gland in cross section, endocrine gland. This medical illustration shows the structure of the adrenal gland in a frontal cut. We can see the adrenal medulla in the center in purple. This structure secretes norepinephrine and adrenaline (increased heart rate and increased blood pressure). Around the adrenal medulla is the adrenal cortex. This is the adrenal cortex part. It produces hormones called corticosteroids (Cortisol), mineralocorticoids (Aldosterone), and androgens.