Gas Exchange

Cards (31)

  • What is the primary job of the lungs?
    Organs of breathing
  • How many lobes does the left lung have?
    Two lobes
  • How many lobes does the right lung have?
    Three lobes
  • Why is the left lung smaller than the right lung?
    It fits around the heart
  • What is gas exchange?
    Oxygen and carbon dioxide movement
  • What is the texture of the lungs?
    Very spongy
  • What is the significance of the large surface area of the lungs?
    Facilitates efficient gas exchange
  • What is the trachea's function?
    Carries air into the lungs
  • What prevents the trachea from collapsing?
    Rings of cartilage
  • What do bronchi do?
    Carry air into each lung
  • What are bronchioles?
    Smaller tubes carrying air to alveoli
  • What is the function of alveoli?
    Site of gas exchange
  • How does the diaphragm assist in breathing?
    Changes shape to alter chest cavity size
  • What protects the heart and lungs?
    Ribcage
  • What is inhalation?
    Taking air into the lungs
  • What happens during exhalation?
    Air is pushed out of the lungs
  • What do intercostal muscles do during inhalation?
    Contract to move ribcage up
  • What happens to the diaphragm during inhalation?
    Contracts and flattens
  • What is the effect of inhalation on chest volume?
    Increases
  • What happens to lung pressure during inhalation?
    Decreases
  • What is the movement of air during inhalation?
    Into the lungs
  • Where does gas exchange occur?
    In the alveoli
  • What are the features of alveoli that facilitate gas exchange?
    Moist, thin walls, large surface area
  • What is diffusion in the context of gas exchange?
    Movement from high to low concentration
  • What gas diffuses from alveoli into the blood?
    Oxygen
  • What gas diffuses from the blood into the alveoli?
    Carbon dioxide
  • What are capillaries?
    Tiny blood vessels
  • How do capillaries relate to gas exchange?
    They surround alveoli for gas exchange
  • How do the features of alveoli enhance gas exchange efficiency?
    Thin walls and large surface area optimize diffusion
  • What are the main components of the respiratory system?
    • Lungs
    • Trachea
    • Diaphragm
    • Ribs
    • Bronchi
    • Bronchioles
    • Alveoli
    • Intercostal muscles
  • What are the steps of the breathing process?
    1. Inhalation: air enters lungs
    2. Exhalation: air exits lungs
    3. Diaphragm and intercostal muscles contract and relax
    4. Changes in chest volume and lung pressure