The respiratory zone of the airways does NOT have ________ and ________.smooth muscle; squamous epitheliumsurfactant; smooth musclecapillaries; pseudostratified squamous epitheliumhyaline cartilage; pseudostratified columnar epithelium
Question
The respiratory zone of the airways does NOT have ________ and ________.smooth muscle; squamous epitheliumsurfactant; smooth musclecapillaries; pseudostratified squamous epitheliumhyaline cartilage; pseudostratified columnar epithelium
Solution
The respiratory zone of the airways does NOT have hyaline cartilage; pseudostratified columnar epithelium.
Here's why:
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The respiratory zone of the airways is the site of gas exchange in the lungs. It includes structures like the respiratory bronchioles, alveolar ducts, and alveoli.
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Hyaline cartilage is found in the trachea and bronchi, not in the respiratory zone. Its function is to keep the airways open. But in the respiratory zone, the walls are thin enough for gas exchange, and hyaline cartilage is not present.
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Pseudostratified columnar epithelium is also not found in the respiratory zone. This type of tissue lines most of the airways (like the trachea and bronchi), but in the respiratory zone, the lining is primarily made up of simple squamous epithelium to allow for efficient gas exchange.
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