breathing

• What is the primary job of the lungs?

  Organs of breathing
• How many lobes does the left lung have?

  2 lobes
• How many lobes does the right lung have?

  3 lobes
• Why is the left lung smaller than the right lung?

  Left lung is smaller as it fits around the heart
• What is gas exchange?

  The process of oxygen and carbon dioxide moving between the lungs and the blood.
• What is the texture of the lungs?

  Very spongy
• What is the function of the trachea?

  Carries air into the lungs from the mouth and nose
• What prevents the trachea from collapsing?

  Rings of cartilage
• What do bronchi do?

  Carry air into each lung
• What are bronchioles?

  Smaller tubes. carry air from bronchi to the alveoil
• Where does gas exchange occur?

  In the alveoli
• What are capillaries?

  Tiny blood vessels in alveoli
• How do gases move in the alveoli?

  By diffusion
• What is diffusion?

  Movement from high to low concentration
• What happens to carbon dioxide during gas exchange?

  Diffuses into the alveoli
• What are the functions of the diaphragm and ribcage in breathing?

  • Diaphragm: alters chest cavity size
  • Ribcage: protects heart and lungs