The sacral portion of the parasympathetic nervous system originates from the

________ molecules are the most abundant gas molecules in the air we breathe

A) Hydrogen B) Carbon dioxide C) Oxygen D) None of the above

To know how to respond during a(n) ________ accident, you should familiarize yourself with the location of circuit breakers and emergency power shutoffs.

Fill in the blank(s) with the appropriate word(s).