Alveoli and Cartilaginous rings in trachea. (function
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A normal trachea (windpipe) has many rings made of cartilage (a strong and flexible tissue). These rings are C-shaped and support the trachea but also allow it to move and flex when your child breathes.
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These rings are C-shaped and support the trachea but also allow it to move and flex when your child breathes.
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