The nervous system that is responsible for you being able to write with a pencil is called the central nervous system. The central nervous system is the group of nerve tissues that controls the activities required by the human body. It consists of the brain and the spinal chord. It coordinates all the information it receives from all the different parts of the body. It also influences the requirements and activities of the body. For example, it is responsible for the messages that need to be sent from the brain to the fingers of the hand to "tell" your hand how to hold a pencil and how to form letters with the pencil.
