Arm, back, legs, stomach, and in reality you would need to use them all at least once
The lungs hold air that is breathed in. Oxygen gas in the air moves into the blood. The heart pumps to transports this oxygenated blood to cells in the body that need it to produce energy. Hope This Helps! :)<span>
</span>
Condoms are both a birth control and help prevent STI's.
