What is the function an apple provides for our body?

You mean besides keeping the doctor away and answering your questions?!!  

Resecent research has shown that eating an apple or drinking apple juice each day may help reduce the levels of “bad cholesterol” (LDL) in your body.  Basically, this means apples help prevent some damage that fatty foods may cause.  Apples are packed with vitamins and fiber; both of which you need to keep healthy.