It is made up of many specialized cells and a complex collection of nerves that signals between different parts of the body. There are two components or the nervous system (the central and peripheral nervous system) as well as two subdivisions (the autonomic or involuntary and the somatic or voluntary nervous system) that are complex and each have a specific job that they do within this body system.
There are two components of the nervous system- the central nervous system and the peripheral nervous system. The central nervous system consists of the brain, spinal cord, and many nerves. The peripheral nervous system is made up of sensory neurons, ganglia, and nerves that are connected to the central nervous system.
Under the two main components of the nervous system (central and peripheral), there are two subdivisions- the autonomic (involuntary) and the somatic (voluntary) systems. The autonomic nervous system is in charge of controlling body processes, such as vital signs (blood pressure, pulse, respiratory rate, temperature). The autonomic system controls parts of the body that work without a conscious effort from the patient. The somatic system is made up of nerves “that connect the brain and spinal cord with muscles and sensory receptors in the skin (livescience, para