Human respiratory system - bronchioles, Biology

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BRONCHUS -

In thorax trachea is devided in to 2 bronchi that enter into lungs of its own side. Rings present in it.

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BRONCHIOLES -

These are branches of bronchus. Rings present. According to diameter may be primary or secondary or tertiary.

RESPIRATORY BRONCHIOLES -

These are branches of tertiary bronchioles. Very thin. Lumen is narrow. Rings are absent.


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