rings of cartilage are present in trachea. give reason
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The cartilaginous rings are incomplete to allow the trachea to collapse slightly so that food can pass down the esophagus. A flap-like epiglottis closes the opening to the larynx during swallowing to prevent swallowed matter from entering the trachea.....
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Rings of cartilage are present in the trachea because it provide flexibility and support to the trachea permitting it to move it and flex when breathing.
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