The universal trigger for fear is the threat of harm, real or imagined. This threat can be for our physical, emotional or psychological well-being. While there are certain things that trigger fear in most of us, we can learn to become afraid of nearly anything.
Sensory neurons respond to signals from receptors in both the internal and external environments. The sensory neurons then carry the message to the spinal cord.
A limited blood supply and slow metabolism
Do u mean ur anatomy organs??
