If you've already completed a full year of A&P and not a single semester that's basically a survey course, I would suggest taking the chem course. Pathophys would be even better. Pharmacology would be good to take after a patho course or a chemistry course. You really want to have a good understanding of anatomy, physiology, pathophysiology, and pharmacology. This may be a relatively heavy load, but you'll set yourself up for going into just about any career in healthcare and it'll make Paramedic school a whole lot easier to understand and a whole lot easier to get through.