图示：支气管假复层柱状上皮的纤毛电镜图。图中可见微管排布特点，周围是9组成对的双联微管，中央为2条完整的微管。
This electron micrograph of the cilia of the pseudostratified epithelium of the tracheal mucosa reveals the arrangement of microtubules, with 9 peripheral doublets and two central singlets. The radial spokes projecting from doublets to a central sheath around the singlets, and the dynein arms projecting between doublets, are hardly visible in this preparation.
