The sound waves are reflected by the heart walls (muscle) and heart valves, back to the transducer, which changes the sound into a picture.
(The sound waves; are reflected; by the heart walls (muscle) and heart valves, back to the transducer) (the transducer; changes; the sound; into a picture)
The sound waves the transducer
are reflected changes
by the heart walls (muscle) and heart valves, back to the transducer
the sound into a picture