Ventilation and the Respiratory system

• Whys is an equal amount of nitrogen there when your breathe as when you breathe in and what is it used for?

  • Nitrogen is used for protein formation
  • We cannot break down the triple covalent bond between the two nitrogen atoms
• How much oxygen is absorbed by the blood?

  4%
• Why is there more CO2 when you breathe out?

  • You have x100 more CO2 when your breathe out
  • This is because CO2 is a waste product and your body needs to get rid of it
• Tidal volume


  The volume of air you breathe in and out
• Vital capacity


  The most amount of air you take in in a big breath
• Residual air


  Air left in your lungs when you breathe out
• Total lung capacity


  The combination of the vital lung capacity and the residual air