It's none of your business to know about my health. Period sis
Answer:
Lubricates joints and body cells
Answer:Surface tension within the pleural cavity pulls the lungs outward. ... that is, air flows from an area of higher pressure to an area of lower pressure.
Explanation:
Surface tension within the pleural cavity pulls the lungs outward. ... that is, air flows from an area of higher pressure to an area of lower pressure.