Hi, I need help with essay on Breathing and Respiration. Paper must be at least 500 words. Please, no plagiarized work!
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The nasal cavity (nose) is the preferred entrance for outside air into the respiratory system. The hairs that line the inside wall are part of the air-cleansing system. Air also enters through the oral cavity (mouth), especially in people who have a mouth-breathing habit or whose nasal passages may be temporarily obstructed, as by a cold.The adenoids are overgrown lymph tissue at the top of the throat. When they interfere with breathing, they are generally removed. The lymph system, consisting of nodes (knots of cells) and connecting vessels, carries fluid throughout the body. This system helps resist body infection by filtering out foreign matter, including germs, and producing cells (lymphocytes) to fight them. The tonsils are lymph nodes in the wall of the pharynx that often become infected. They are an unimportant part of the germ-fighting system of the body. When infected, they are generally re-moved.The pharynx (throat) collects incoming air from the nose and passes it downward to the tra-chea (windpipe). The epiglottis is a flap of tissue that guards the entrance to the trachea, closing when anything is swallowed that should go into the esophagus and stomach. The larynx (voice box) contains the vocal cords. It is the place where moving air being breathed in and out creates voice sounds. The trachea is the passage leading from the pharynx to the lungs. The trachea di-vides into the two main bronchi (tubes), one for each lung. These, in turn, subdivide further into bronchioles.
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