Which classes are better to take

I would take Anat and Phys seperately. Some schools don't accept them together. Unless you're gunning for programs that specifically lists them as a combined class requirement.

Difficulty depends on how you are as a student. If you're working or have other responsibilities then I'd take 3 semesters with 2 classes each. If you're just a student, then the 2 semesters with three classes each is fine.

It can be tough to get an A in any of those classes, but if you put in the time then you should be fine. I took 3 semesters with 2-3 classes each and I got A's in all except for Sociology. It was boring. hah.

Anatomy and Physiology as two separate classes or take them together as A&P 1 and 2 other than that I only have 4 other prereqs which are math, microbiology, chemisty, and sociology. Which of these classes were the most difficult and which were the easiest and how hard is it to get an A on them? And how should I set them up should I take 2 semesters with 3 classes each , or 3 semesters with 2 classes each ?

It varies with each school. What are required for acceptance and ranking? If they are all involved in the points, then I would try to extend it as long as I could.

I would take anatomy I and then anatomy II. I would not double up. Most schools I've seen uses anatomy II as a continuation of II. If you are a decent at math, I would take a math with anatomy one. Sociology with anatomy II. Microbiology with a general education class for the degree or one you can transfer to a BSN program. Then chemistry over the summer by itself. Not the best formulation, but it will help you get the best grade.

I would also use ratetheprofessor and look at the instructor for lab and lecture.

As for easiest, there are too many factors. If you have a great teacher and time to study, then anything could be considered easiest in my opinion. If you have a horrible teacher where you pull your hair out because none of it makes sense and the teacher is so disorganized, then it can be a nightmare. My one chemistry instructor never taught the subject before and was thrown into the class 2 semesters before. I had a B in the class but I don't understand chemistry. The kid who was taking it for an easy A because he had college credit already from AP chemistry struggled in it.

I liked taking them together. At my school we would learn the physiology in lecture and anatomy in lab, and they coincided with each other, completing the puzzle.