<span>Blood vessels are dilated to increase the amount of oxygen carried in the blood, and the lungs work harder to meet the body's oxygen demands.
Blood volume increases during exercise, making the body more efficient, so it is not necessary for the lungs to work as hard.
The lungs determine the speed at which the heart pumps, so blood flows at a level that accommodates oxygen absorption in the muscles.
The lungs expand and contract, which increases the rate of blood flow so the muscles can
hope this helps</span>
The answer is strong refusal skills. A teen who has been properly raised would know the difference between right and wrong and has a sense of directions to what he or she wants to do with his or her life. They have the decision to put themselves in that position. No amount of peer pressure would force a strong youth to take drugs when he or she is capable of taking charge of his or her life.
D. Screaming
Nonverbal mean no speaking involved..
