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.
1 Homophony is an important category of musical texture. 2  It comprises a melody and an accompaniment. 3  The accompaniment may consist of chords moving together with the melody, or a more elaborate pattern, possibly of broken chords or figurations.  The melody may be in the highest register or it may be lower in the texture.