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Choose a Page:*How do we breathe?*How do our eyes see?Where does our food go?How do we taste and smell?How do our ears work?How does a baby develop during pre... How do we breathe? Our bodies need oxygen, which they get from air breathed into the lungs. The lungs are made to expand by a big muscle called the diaphragm, and smaller muscles fixed to the ribs. The diaphragm pushes downward, while the other muscles lift up the ribcage. This draws air down into the lungs, where the oxygen is absorbed into the blood stream.   Previous: Back Book: Best Ever Q&A Section: Science & Technology Chapter: Senses & Organs