Simplify the following text for a Grade 11 native English-speaking person.
Original: Cardiology ( from Greek , kardiÄ , `` heart '' ; and , - logia ) is a medical specialty dealing with disorders of the heart ( specifically the human heart ) .
Simplified: Cardiology ( from Greek , kardiÄ , `` heart '' ; and , - logia ) is a medical field that deals with disorders of the heart and blood vessels .