The body utilizes ATP that is stored in the muscles to perform anaerobic exercises. ATP stands for Adenosine Triphosphate which is a complex organic chemical - the source of energy that keeps everything going. The ATP is used for many cell functions including transport work moving substances across cell membranes, mechanical work, supplying the energy needed for muscle contraction...
You can line them up by the sink tell them to wash their hands and sing them the handwashing song song.
The best answer for the blood vessels' valves would be these are veins that would then help in preventing the back flow of blood because the walls have small muscle to pump the blood back to the heart.Hope this is the answer.
