Question

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Answer 1

Answer:

hope this answers is helpful

Explanation:

1. When you inhale, muscles increase the size of your thoracic (chest) cavity and expand your lungs. This increases their volume, so pressure inside the lungs decreases. As a result, outside air rushes into the lungs. That's because a gas always flows from an area of higher to lower pressures
2. Pleurisy occurs when the membrane lining the inner side of your chest cavity, known as the pleura, becomes inflamed. This can cause pain on either side of your chest when you breathe in and out, as well as pain in your shoulders and back. Symptoms include: chest pain that gets worse with coughing, sneezing, or laughing.
3. diaphragm and the rib cage