The ____ is (are) a muscle that separates the chest cavity from the abdomen.

Name: The ____ is (are) a muscle that separates the chest cavity from the abdomen.
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The diaphragm is a dome-shaped muscle that separates the thoracic cavity (which contains the heart and lungs) from the abdominal cavity. The intercostals are muscles between the ribs, the pectorals are chest muscles, and the obliques are abdominal muscles, none of which separate the chest cavity from the abdomen.

The ____ Is (Are) a Muscle That Separates the Chest