Respiration is the physical act of inspiration and exhalation of oxygen. Gas exchange is what happens in the lungs to use the oxygen that is brought in and expel the Carbon Dioxide brought back into the lungs from the cells. Respiration is the physical act of inspiration and exhalation of oxygen.
Definition of polyphony. : a style of musical composition employing two or more simultaneous but relatively independent melodic lines : counterpoint.
Music morphed into ornate, boisterous compositions written by some of history's finest composers and played by huge orchestras. It was too much, too soon, however, and the melodies became lost in multiple musical instruments playing independently -- a technique called polyphony.