Next to the fast, electrical nervous system runs a slower chemical one. It is a network of glands that pour hormones into the blood. Hormones shape mood, sleep, stress, hunger, and growth. Tap any gland to see its hormone and what it does. Then run the stress chain below and watch cortisol over time.
The glands of the body
Tap a gland on the body · or choose one from the list
The stress chain (HPA axis)
Pick a stressor. You will see the chain light up on the body, and the graph will show cortisol in the blood over time.