Most people have 24 ribs, with 12 on each side of the body. No evidence indicates any difference between males and females. The ribs and rib cage are excellent examples of the human body’s ...

Pleural membranes Thin layers that reduce friction between the lungs and the inside of the chest wall during breathing Pleural fluid (Higher Tier) Fluid found in the pleural cavity (between the ...

The diaphragm is a thin layer of muscle and tissue that separates the chest and abdominal cavities. It is the main muscle the body uses to breathe. When a child has a congenital diaphragmatic ...