You are right the human anatomy is realy complex and once you listen to those tones and this is in normal anatomy, what about those who have heart murmur sometimes this is systolic or diastolic depending on the problem, some of them could be physiological and due to growth in puberty, just viral infection or some of them due to valve narrowing or prolapsing when the blood flows backward due to leaking valve. In that case the orchestra has more new tones and sometimes even unusual and extraordinary, for those who have very rare defects. So you are right there are many different sounds and tones in our circulatory system :)