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Oxygen and carbon dioxide increase and decrease in the lungs.

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What two gasses increase or decrease during inhaling exhaling?

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What are the two gases increase or decrease during inhaling and exhaling?

During inhalation, the levels of oxygen in the body increase as oxygen is taken in from the air. During exhalation, the levels of carbon dioxide in the body increase as carbon dioxide is expelled from the lungs.


Why does the size of chest increase or decrease on inhaling or exhaling?

The size of the chest increases during inhalation due to the contraction of the diaphragm and intercostal muscles, which expands the thoracic cavity and allows air to fill the lungs. Conversely, during exhalation, these muscles relax, causing the chest cavity to decrease in size and pushing air out of the lungs. This dynamic change in chest volume is essential for respiration.


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