Respiratory system

• Respiratory System


  Also known as human breathing system, responsible for taking in oxygen and expelling carbon dioxide
• Parts of Respiratory System

  • Nose and Mouth
  • Nasal Cavity and Nasal Passageway
  • Pharynx
  • Larynx
  • Trachea
  • Lungs
  • Bronchi
  • Bronchioles
  • Alveoli
• Nose and Mouth


  Entrance of oxygen in our body
• Nasal Cavity and Nasal Passageway

  • Air passing this part is warm, damp and clean
• Pharynx


  Our throat
• Larynx


  Our voice box
• Trachea


  Also known as "windpipe", an empty tube that serves as passageways of air into lungs
• Lungs


  The main organs of the respiratory system
• Bronchi


  The two branching tubes that connect the trachea to the lungs
• Bronchioles


  The hair-like tubes that connect to the alveoli
• Alveoli


  The air sacs that allow gas exchange in the lungs
• What happens when we breathe in

  1. Oxygen enters our body

  2. Ribs move out and chest space increases

  3. Diaphragm muscle contracts
• What happens when we breathe out

  1. Carbon dioxide exits our body

  2. Ribs move in and chest space decreases

  3. Diaphragm muscle relaxes