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Trachea is a common biological term for an airway through which respiratory air transport takes place in organisms. The cells that line the trachea have minuscule hairs, which collect any dust that you inhale, and prevent it from entering your lungs. It is then removed by coughing. To prevent food from entering your windpipe, it has a small flap of skin at the entrance (epiglottis). When you eat, this flap closes over your trachea to prevent food from entering. * Vertebrate trachea, in terrestrial vertebrates, such as birds and mammals, the trachea allows oxygen and carbon dioxide to move from the throat to the lungs * Invertebrate trachea, in terrestrial invertebrates, such as onychophorans and insects, tracheae conduct air from outside the organism directly to all internal tissues

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15y ago

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