There are no prerequisites, but you need to try to take as many Honors/AP/IB classes as possible. If I were you I'd focus on these areas:
science: pretty much science in general, but more specifically Chemistry, Anatomy and Physiology, Biology, Biochemistry, etc.
Math: Calculus, Statistics
you have to go to college to become a surgeon. In high school take all the college prep classes you can
Physical Science, and Language Arts
High school classes do not count towards becoming a surgeon. What makes high school important is that you are setting the foundation for getting into a good college for your freshman year. You need to take the college prep classes, keep a good GPA, do some community service, and become involved in your high school in some way. The colleges looks at these factors when students apply. Do well in college and you can apply to medical school to become the surgeon you want to be.
To be a surgeon, you should take math and science classes in high school, then take biology or premed classes in college and go to medical school.
In high school you don't take classes to help you become a brain surgeon, but you do need to have a good GPA, good test scores, college prep or AP classes. Some universities also require community service and school activities. Set your goal, take plenty of science classes, learn how to do research papers, and study hard.
You cannot go directly from high school to vet school, and you cannot become a veterinarian straight out of high school. However, you can take some classes that will help you eventually become a veterinarian. Mostly you should focus on taking the most difficult math and science courses that you can handle - biology, chemistry, physics, algebra II, pre-calculus and calculus.
No high school classes, other then your core classes (math, reading, etc.) are required for a profession after high school
Answerbiology , chemistry , and phyisics / senior level .
Drama
Answer: you need to take zoology in high school if you want to become a zoologist :)
you have to take cooking classes
7-10 years after high school.