Answer:
When you exercise, no matter how intense, your heart rate goes up, and because of this, you breathe more. The body needs oxygen so you breathe more as the heart pumps the oxygen carrying cells throughout your body.
Answer:
The heart beats faster and breathing gets heavier during exercise. These changes occur because the body needs more oxygen to exercise, and the heart needs to pump this oxygen to the body parts that need it.
Explanation:
