Lungs are located within our chest cavity inside the rib cage and are made of spongy, elastic tissue that stretches and constricts as we breathe. The airways that bring air into the lungs (the trachea and bronchi) are made of smooth muscle and cartilage, allowing the airways to constrict and expand. The lungs and airways bring in fresh, oxygen – enriched air and get rid of waste carbon dioxide made by your cells.
They also help in regulating the concentration of hydrogen ion (pH) in blood.
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http://www.wonderwhizkids.com/index.php/lungs
They also help in regulating the concentration of hydrogen ion (pH) in blood.
read more.....
http://www.wonderwhizkids.com/index.php/lungs
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