The end result is the simplest form of etching. There are more complicated ways to create more intricate etchings by using a number of different plates and colors. There is also a process to add different tones to the image that involves adding resin dust to the plate and heating it.
Nerves carry electrochemical signals to and from different areas of the nervous system as well as between the nervous system and other tissues and organs. Nerves are divided into four classes: Cranial nerves connect your sense organs (eyes, ears, nose, mouth) to your brain.
The digestive system sends sensory information to the brain (CNS) The nervous system interacts with every system in your body. It is a specialized network of tissues, and neurons. The nervous system takes messages from the brain and tells what your body to do. Your body also sends messages back to your brain. You will find some of the systems the nervous system interacts with next!