breathing

• what are the parts of the respiratory system


  nose cavity, mouth, throat, voicebox (larynx) , lungs, airways, trachea (windpipe), bronchi, bronchiolsus, alvelous, alveoli, diaphragam
• where does gas exchange occur


  alveoli
• what gases do you inhale and exhale

  carbon dioxide, oxygen, nitrogen and other gases
• what happens when you inhale

  air enters the nose or mouth, travels down the trachea, and branches into bronchi, which lead to the lungs
• Gas Exchange


  Oxygen enters alveoli, diffuses into capillaries, binds to hemoglobin, and forms oxyhemoglobin, which is transported to tissues.
• what happens to the diaphragam and chest when you inhale

  the diaphragam contracts and moves down and your the muscles between your ribs contract - and pull up, your chest cavity then increases, this all decreases the pressure inside and air starts to fill up your lungs