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.
Melodies can interact a number of different ways, so there are several broad terms that describe the different kinds of textures based solely on melody. Monophony is the texture comprised of one-and only one-melody. Polyphony is the texture comprised of more than one melody, and Heterophony is the texture of the same melody played in different parts in slightly different ways. Call and Response is made up of two different melodies in alternation.