Without air coming up from the lungs and activating the vocal chords, there would be no sound. Breathing is a purposeful coordination between:
Singers are similar to athletes. They must coordinate various muscle groups and ligaments if they are to perform at a hight level.
Despite all of this, breathing properly for singing is not all that difficult. Here is what you must do at all times when you sing:
So when you sing during the week, practice your breathing. (This CANNOT be done in the car.) Remember: The better the breathing process, the better your sacrifice of praise will be!!