The central nervous system consists of the . The peripheral nervous system comprises the . somatic and autonomic nervous systems; sympathetic and parasympathetic nervous systems

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

the answer would be..

b. sucking

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?