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Actually, no. The rectus abdominis is a muscle that helps with the digestion of food, helps to hold organs in one place and gives you the "6 pack" feature when doing sit ups. There are two other muscles on the ribs that help the lungs with inspiration. They are the Intercostalis muscles. One is on the ribs themselves and one is on the gaps between the ribs. They move the ribs in and out with the lungs with every inspiration and expiration.

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13y ago

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