Breathing and Ventilation

• Aerobic digestion


  Glucose + oxygen → carbon dioxide & water + energy
• Anaerobic digestion


  Glucose → lactic acid + energy (only 5%)
• Aerobic - with oxygen, Anaerobic - without oxygen
• Breathing


  The movement of air in and out of the lungs
• Ventilation


  Another term for breathing
• Respiration


  The chemical way of making energy
• Breathing


  The mechanical way of getting oxygen into the lungs
• Breathing in


  1. Intercostal muscles contract to move the ribs outwards

  2. Diaphragm contracts and moves down

  3. Volume inside the chest increases

  4. Lungs inflate as pressure decreases
• Lungs inflating


  Causes air to rush into the lungs