Biology: structure inspiration and expiration

• What are the main structures involved in respiration?

  Ribs, diaphragm, air
• What happens to the volume of the thoracic cavity during inspiration?

  The volume increases
• What happens to pressure in the thoracic cavity during inspiration?

  The pressure decreases
• How does air move into the lungs during inspiration?

  Air moves in due to decreased pressure
• What is the process of breathing out called?

  Expiration
• What happens to the diaphragm during expiration?

  The diaphragm moves up
• What happens to the volume of the thoracic cavity during expiration?

  The volume decreases
• What happens to pressure in the thoracic cavity during expiration?

  The pressure increases
• How does air move out of the lungs during expiration?

  Air moves out due to increased pressure
• What are the key differences between inspiration and expiration?

  • Inspiration:
  • Diaphragm moves down
  • Volume increases
  • Pressure decreases
  • Air moves into lungs

  
  

  • Expiration:
  • Diaphragm moves up
  • Volume decreases
  • Pressure increases
  • Air moves out of lungs