Because there is no need for a fast transmission, in most cases, of the chemical messengers (hormones). Therefore, the nerve cells are unmyelinated and send their signal in a continuous transmission.
autonomic nervous system
Nervous System
smooth muscle
They are controlled by the autonomous nervous system.== ==
The hernia
intrinsic eye muscles are controlled by the autonomic nervous system
The emergency, or "fight or flight" part of the nervous system is the sympathetic nervous system. The parasympathetic nervous system produces a "rest and digest" response.
because skeletal muscle is voluntary, the autonomic nervous system is that of involuntary impulses
The autonomic nervous system.
The brain's hypothalamus is known to have evolved in humans to enable them to cope with sudden life-threatening emergencies.
The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous systems.
The involuntary nervous system that is involved with organ regulation is called the Autonomic nervous system (ANS) and is comprised of the Sympathetic nervous system and the Parasympathetic nervous system.