Inside your chest, a set of expandable bags helps keep your heart pumping and your blood moving. As the main part of your respiratory system, your amazing lungs pull in oxygen and push out poisons and germs to keep you healthy.
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Inside your chest, a set of expandable bags helps keep your heart pumping and your blood moving. As the main part of your respiratory system, your amazing lungs pull in oxygen and push out poisons and germs to keep you healthy.
Read Less
