Embryology of the Respiratory Tract

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The correct answer is C.

Explanation:

Laryngeal cartilages (e.g., the thyroid, cricoid, arytenoid cartilages) are derived from neural crest.

The endothelial cells (choice A) in the simple squamous epithelium that lines the pulmonary capillaries are derived from visceral mesoderm.

Rise and Fall of Epithelial Phenotype: Concepts of Epithelial-Mesenchymal TransitionThe epithelial lining of primary bronchi (choice B) is derived from endoderm.

Tracheal glands (choice D) and epithelium both derive from endoderm.

Type I pneumocytes (choice E) are derived from endoderm.

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