English, asked by Anonymous, 9 months ago

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Answered by chimpee47

The thoracic cage protects the heart and lungs. It is composed of 12 pairs of ribs with their costal cartilages and the sternum.

hope it helps you.

Answered by Anonymous

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The mammalian respiratory system consists of a gas exchanger (the lungs), which are cyclically inflated and deflated by a pump (the diaphragm, rib cage and intercostal, accessory and abdominal muscles), via a single partially collapsible intake manifold (the nose, mouth and upper airway). The ability of the respiratory pump to achieve adequate gas exchange depends, in part, on resistive and elastic loads imposed and the real-time response of the system. Although the rib cage is commonly thought of as a ‘structural’ element of the respiratory system, the muscular components are all under continuous neural modulation and subject to further modulation by state.

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