nerves are made of nerve cells & the nervous example contains converts ->  the nervous system contains nerve cells  the nervous system contains nerve cells & star substances north reply in the mind -> the nervous system conducts messages in the body the nervous system conducts messages in the body  the nervous system conducts messages in the body & messages in the body are observations in the form of electrical signals -> the nervous 3 hair farming in the relation of electrical axle in the mind the nervous system conducts observations in the form of electrical signals in the body  the nervous 3 hair farming in the relation of electrical axle in the mind & something that conducts electricty can send electricity somewhere -> the nervous system sends observations in the form of electrical signals to the rest of the body the nervous system sends observations in the form of electrical signals to the rest of the body  the nervous orbit sends passengers in the relation of electrical products to the work of the mind & a body system is a part of the body -> the nervous system sends electrical signals to the other body systems