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The smallest is a segmental bronchus.

The trachea is the largest and branches into the main (left and right) bronchi which then branch several times before branching into lobar bronchi and then segmental bronchi.

Each lung is made up of lobes (generally the left lung has 2 lobes and the right has 3) and the lobes are comprised of segments.

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14y ago
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3w ago

The trachea has the largest diameter, followed by the right main bronchus, then the left main bronchus, and finally the segmental bronchi have the smallest diameter. Lobar bronchi are larger than segmental bronchi but smaller than the main bronchi.

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Q: What is the smallest in diameter a segmental bronchus the trachea the right main bronchus a lobar bron?
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Inhaled air passes through which of the following last?

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