Our high school also offers Anatomy and Physiology as well as Biology 2, so it can’t be that unusual.
Pre-med programs like it if you have taken Physics. In our district, if you take the right courses, including Chemistry, Biology 1, Physics, and one other Science, as well as Algebra, Geometry, Pre-Calculus and Calculus (if your school offers it), and get the right grades, you get a special “distinguished” diploma, which never hurts your chances of getting into a good pre-med program.
My daughter also wants to be a surgeon, so she has concentrated on taking as much math and science as she can, getting high grades, and carrying a full load of diverse outside activities, including sports, and very importantly, volunteer work in a hospital and in a vet office. The last is vital if you want to show future programs that you know what working in a hospital with patients is like and that you enjoy that work.
The medical volunteer work also puts you in touch with doctors who get to know you well enough that they can serve as references for you.