WHY DID THE DOCTOR JUST FOCUS ON THESE TWO SYSTEMS IN A PHYSICAL?

goofball3456
So I went to a doctor for a physical and she took my vitals (all normal) and then talked to me if I had any problems and then she listened to just my lungs and my heart, out of all the body parts are these the two most important ones?
WHY DID THE DOCTOR JUST FOCUS ON THESE TWO SYSTEMS IN A PHYSICAL?
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