respiratory system

• The respiratory system provides oxygen for the body and allows carbon dioxide to leave it. It's made of the nose, mouth, trachea, bronchi, and lungs.
• breathing/gas exchange
• how does gas exchange work?

  the alveoli are surronded by capillaries. oxygen diffuses into the blood, CO2 diffuses out
• Diseases of the respiratory system include:

  • cancers
  • turberculosis
  • chronic obstructive pulmonary disease (COPD)
  • asthma
  • cystic fibrosis
  • pneumonia