by breathing
People, and many other air breathing creatures
Air is used for breathing. Breathing is used to introduce oxygen into our system. Oxygen is necessary for life. Without breathing in air we would die.
by breathing and storing air inside and releasing it
Scuba Breathing Apparatus.
Approximately 21% of the air is oxygen, which we use for breathing. The remaining 78% is nitrogen, which is mainly inert and not used for respiration.
In space, people call it a vacuum because there is no way you can breath because the are no oxygen molecules in space for you to breath. That is where the backpack comes in. The bag is a place where it holds all the air for you to breath, there is a limited amount of time for you to breath because you are inhaling good air and releasing bad air. If you keep breathing the bad air, you can die from breathing you bad air (carbon dioxide) too much. Th backpack holds the air for you, it is just like an air tank you use for swimming. Have you ever seen in shows how some people use the paper bag to breathe when they are nervous and sometimes they faint? That happens because of one of two reasons. They were breathing too fast (it can happen) or because they are breathing there air too much.
It takes in and releases air through a blowhole atop its head.
air is in the water because although sea animals use this while breathing under the water
air is in the water because although sea animals use this while breathing under the water
The use of a machine to move air. In medical terms, a machine to aid a person in breathing by moving air into and out of their lungs.
People use air is a wide variety of ways including: 1) breathing; 2) ventilation; 3) drying laundry; 4) aerosols; 5) sports (inflated balls); 6) fans; 7) baking; 8) entertainment (hot air balloons and kites); 9) tires; and 10) compressors.