Think of the body as a massive Internet with IoT (internet of things).

Signals are carried along the nervous system to the hypothalamus, the command center of our endocrine system, which controls an array of devices (the adrenals, thyroid, pituitary, ovaries, testes etc.)

… the device does whatever work it’s told to… but if the signals don’t arrive, or arrive corrupted, your harmonious system can fail in surprising, hard to diagnose ways.