our nerves are the most important parts of us. while they are pretty much everywhere they are also the most delicate and sensitive part o us. while we may think it is a simple strain, it can actually be your nervous system having a problem
This source like the title saids explains the evolution. it compares it to our ancestors and other creatures related to us.
It is able to explain the two main parts and how our body is unique and how different parts control throughout our body. It also explains the anatomy of it
This is a human nervous system, it is made up of the brain, spine and neurons. it is unique because it works together in order to be able to survive. while it is the most sensitive, it is one of the most vital