The nervous system is the part of an animal 's body that coordinates its voluntary and involuntary actions and transmits signals to and from different parts of its body. Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago.he size of the nervous system ranges from a few hundred cells in the simplest worms, to around 100 billion cells in humans. The central nervous system functions to send signals from one cell to others, or from one part of the body to others and to receive feedback.
Use an all-purpose kitchen cleaner and a rag or paper towel to wipe the rest of the surfaces of the oven clean. In order to avoid a streaky appearance, you should clean the window with a glass cleaner or a mixture of one part each of rubbing alcohol, one part vinegar and two parts water.
Self-Cleaning Ovens. If you have a self-cleaning feature on your oven, use it frequently to remove the grease and burnt food that accumulates on the walls of the oven. Follow the instructions in your owner's manual.elf-Cleaning Ovens. If you have a self-cleaning feature on your oven, use it frequently to remove the grease and burnt food that accumulates on the walls of the oven. Follow the instructions in your owner's manual.