Biology, Organic Chemistry, Chemistry, Nutrition, and other science classes will definitely be important to take if you are heading into any type of health care field. A language can also be very helpful (not all of your patients will speak English, so being able to communicate is important! I took Latin. Even though people no longer speak it, many of our words and medical terminology is derived from Latin, so it makes learning names, meanings, and procedures much easier to identify. Speak with your school's guidance counselor to see what is offered at your school. They are trained to know what types of courses you should take to help you get into the major you are looking for!
Take all the science classes. This will help you get good grades in college.