Why do you need to breathe continually even when you sleep?

Breathing is essential for supplying oxygen to the body and removing carbon dioxide, which are critical processes for cellular function and overall metabolism. Even during sleep, the body continues to require oxygen to support vital functions, including brain activity and tissue repair. Additionally, the respiratory system operates autonomously through the brainstem, ensuring that breathing continues even when we are not consciously aware of it. This continuous oxygen supply is vital for maintaining life and health, regardless of our state of consciousness.