Breathing Difficulty - Lying Down
Alternate Names : Difficulty Breathing While Lying Down, Orthopnea, Paroxysmal Nocturnal Dyspnea, PND, Waking at Night Short of Breath
Pictures & Images
Breathing
Breathing consists of two phases. The first phase is the inspiration phase. Inspiration allows air to flow into the lungs. The second phase is expiration. Expiration involves gases leaving the lungs. During inspiration, the diaphragm and intercostal muscles contract allowing air to enter the lungs. During expiration, the inspiration muscles relax forcing gases to flow out of the lungs.
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