At which position trachea get branched into bronchioles?

1.	At which position trachea get branched into bronchioles?
Answer» The\xa0respiratory zone\xa0includes the structures of the lung that are directly involved in gas exchange: the\xa0terminal bronchioles\xa0and alveoli. ... This is a blood-air barrier through which gas exchange occurs by simple diffusion.\xa0In\xa0the mediastinum, at the level of the fifth thoracic vertebra, the\xa0trachea\xa0divides\xa0into\xa0the right and left primary\xa0bronchi. The\xa0bronchi branch into\xa0smaller and smaller passageways until they terminate\xa0in\xa0tiny air sacs called\xa0alveoli.

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