I think you will definitely be okay if you take A&P II before A&P I. Someone actually asked my A&P teacher if it was okay to take 2 before 1 and she said oh yeah its fine because you learn total different material. Like A&P 1 you will learn about the brain, bones, tissue, ligaments and then in A&P 2 you will learn about the GI system, the heart, and the kidneys....etc. I wish you much luck!