AQA B3 GASEOUS EXCHANGE

Gaseous Exchange 

• Gaseous Exchange is the exchange of Carbon Dioxide and Oxygen between the blood and the air in the lungs 
• The upper part of the body (chest area) is called the thorax, and the lower part is called the abdomen. 
• The thorax and abdomen are seperated by a muscle called the diaphragm. 
• The diaphragm is used in ventilation. 

• When we inhale (breathe in) the volume of the lungs needs to increase to allow air in. 
• The intercostal muscles (the muscles between the ribs) contract, which forces the ribcage…