Sheet of muscle across the bottom of the chest cavity


Asked by admin @ in Advanced Placement (AP) viewed by 372 People


A sheet of skeletal muscle extends across the ribcage and lies at the base of the thorax. It separates the thoracic cavity from the abdominal cavity. This muscle is the

Answered by admin @



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.


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


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