The blood vessels dilate to increase the "blood traffic" through the lungs to carry more oxygen to the muscle. The lungs work harder (faster respiratory rate) to increase the rate of oxygen/carbon dioxide exchange in the lungs.
External or internal and an example is how you feel about yourself I think
<span>it appears smaller, but not shorter, than the other arm.</span>
c.depression
<span>Panic disorder is when you experience severe feelings of doom that cause both mental and physical symptoms.
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<span>Agoraphobia is the fear of going out in public, either the fear of open spaces or the fear of being in unfamiliar places.
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Depression is f<span>eelings of severe despondency and dejection.
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<span>Selective Mutism is a complex childhood anxiety disorder characterized by a child’s inability to speak and communicate effectively in select social settings.</span>