During exhalation, diaphragm moves ___ towards the chest cavity.

left

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Solution

The correct option is B up
The diaphragm is a muscular structure that separates the thoracic cavity (lungs) from the abdominal cavity (stomach). In its relaxed state, the diaphragm is shaped like a dome.
During inhalation, the diaphragm contracts making it flatter and it moves away from the chest cavity. During exhalation the diaphragm relaxes and moves up towards the chest cavity.

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Inhalation and Exhalation are a result of combined action of thoracic cavity and diaphragms.

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