All cells in the body contain the same DNA, but different cell types express different genes; skin cells express genes for the skin, liver cells express liver genes, and so on.

All cells in the body contain the same DNA, but different cell types express different genes; skin cells express genes for ...

Cilia are organelles present on almost every cell within the body. In the respiratory tract, motile cilia line the epithelial surface and beat in a coordinated fashion to clear mucus from the airways.