For more physics go to: http://www.stmary.ws/highschool/physics/home/notes/default.htm When you breath a part of your body called the diaphragm contracts and increases the volume of your chest cavity. The increase the volume of your chest cavity lowers the pressure, which causes air to be drawn in to your lungs.
can I use ur video in my presentation in the hospital?
hamzarayes2010 3 months ago