The lungs

• Spongy and elastic found in thoracic cavity (chest cavity)
• Name and function of the double Membrane surrounding it

  Double Pleural membrane acts as a lubricant to prevent friction during inhalation and exhalation
• Number of lobes on each lung

  Right lung- 3

  Left lung- 2
• Lungs are protected by:

  Ribcage (12 pairs of ribs)

  Sternum

  Vertebral column
• Concave side of each lung name and function

  Hilum. The bronchi enter the lungs at the hilum
• Why is the lungs so elastic and spongy

  There is lots of alveoli present
• Purpose of intrapleural fluid between the double membrane and it's function

  Prevent friction that occurs when the lungs shrink or expand