This muscle is the
"Diaphragm".
Sheet of interior skeletal muscle that
reaches out over the base of the rib cage. It isolates the thoracic cavity
which contain heart, lungs and ribs, from the abdominal cavity.
<span>This also plays out an imperative role
in breathing: as it contracts, the volume of the thoracic cavity boosts and air
is drawn into the lungs</span>
Answer:
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