Advertisements

Many kinds of single-celled organisms such as the Paramecium in the photograph below move by cilia or flagella. The cilia can be seen covering the cell in the photograph.

Cilia and flagella are projections from the cell. They look like tiny hairs.  They are made up of microtubules. They are designed either to move the cell itself or to move substances over or around the cell.   In this regard, they are a lot like the legs and arms of humans.

The primary purpose of cilia in mammalian cells is to move fluid, mucous, or cells over their surface. Cilia and flagella have the same internal structure. The major difference is in their length.

Advertisements