Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Electron microscopy of cilia from bronchial mucosa. A: A transmission electron microscopic analysis shows a defect in the outer dynein arm in the cilia (arrow). B: Normal structure of cilia, characterized by a typical ’9+2’ structure with nine outer microtubule doublets and a central pair of microtubules.
