What subjects to cart to become a doctor surrounded by singapore?

I'm 13 and i really hope to become a surgeon specialized in the heart and around that area. What subjects are needed to become a doctor?

Can anyone tell me the difference between Cardiac Surgery and Thoracic Surgery? Which one will be a more suitable surgery?
Answers:
Generally, you own to take physics, chemistry and biology to opt for medical education.
Cardiac surgery is surgery on the heart and/or great vessels perform by a cardiac surgeon. Frequently, it is done to treat complications of ischemic heart disease (for example, coronary artery bypass grafting), correct congenital heart disease, or treat valvular heart disease created by various causes including endocarditis. It also includes heart transplantation.
Thoracic surgery is the field of drug involved in the surgical treatment of diseases affecting organs inside the thorax (the chest) excluding the heart. Generally treatment of conditions of the lungs, chest wall, esophagus and diaphragm.
Thoracic surgery is often grouped with cardiac surgery and call cardiothoracic surgery. Source(s): http://www.google.co.in/search?hl=en&q=M…
http://en.wikipedia.org/wiki/Cardiac_sur…
http://en.wikipedia.org/wiki/Thoracic_Su…

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