Document the changes in the histology as the respiratory zone passageways decrease in diameter

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The C-shaped rings of cartilage become complete rings as the bronchi get smaller. These rings become irregular plates and then progressively diminish. The respiratory epithelium changes from respiratory epithelium to columnar cells that gradually become shorter as the bronchi branch and become smaller. Smooth muscle increases in smaller passageways so that the flow of air can be controlled.

Anatomy & Physiology

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Anatomy & Physiology

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Anatomy & Physiology

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What will be an ideal response?

Anatomy & Physiology