The floor of the chest cavity has a thick muscular partition known as

diaphragm

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nasal cavity

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Ribcage

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Nephron

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Solution

The correct option is A
diaphragm

The floor of the chest cavity is known as the diaphragm. The diaphragm actually separates the heart and lungs from the abdominal cavity and performs a significant function in respiration. It moves up and down during inhalation and exhalation respectively.

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The floor of the chest cavity has a thick muscular partition known as the diaphragm.

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