I am confused....plz help!

Ok, I am planning on applying for the Nursing program w/my school in Aug of this year. I want to know something.....on my program plan it states that the prerequitsites are CNA, CPR, General Psychology which I have taken all of these except for one which is Human Anatomy &Physiology 1....My question and I am sooooo concerned with is ...do I have to have to have all these classes BEFORE I apply to the program? Or do I apply then I have to take those classes (provided that I dont have the one)? I hope I am making since here...LOL
Anyone know for sure plz help. Cuz, I dont want to have to wait another full year b4 appling to the program if I am only missing that ONE class! Which btw, I cant take during the summer because its not offered!!
Thanks,
RJ