Question
Write any four differences between tracheoles and bronchioles.
| S.No. | Tracheoles | Bronchioles |
| 1. | These are the respiratory organs of insects. | These are found in mammals and are their respiratory organs. |
| 2. | These are branched parts of small bronchi. | These are branched parts of the tertiary bronchus. |
| 3. | There is cuticle on their walls. | Whereas there is a lack of cuticle on their walls. |
| 4. | These end in darkness. | These make alveoli. |
| 5. | These are filled with liquid. | These are not filled with liquid. |
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