In terms of your heartbeat, digestion, and glandular functioning, your body is pretty much a well-oiled machine that works even when you are asleep. This is possible due to your __________ nervous system.
The autonomic nervous system is responsible for control and regulation of unconscious body functions. It is constantly working even if we don't realize it, unlike the somatic nervous system, which is associated to voluntary actions such as movement via skeletal muscles.
