Mechanisms of Breathing

• ↑
  • Respiratory System
• Inspiration
  • Inhale
  • Diaphragm contracts allowing air in
  • Size of rib cage changes due to intercostal muscle
• Expiration
  • Exhale
  • Diaphragm relaxes to push air out
  • Size of rib cage changes due to intercostal muscle
• Quiet Breathing
  • Passive Recoil
    • Alveolar sacs recoil passively along Diaphragm to exhale.
• Forced Breathing
  • Passive recoil is not enough.
  • More muscles engage to force air in and out.