From Wikipedia, the free encyclopedia - View original article
|This article needs additional citations for verification. (December 2009)|
In biology, motility is the ability to move spontaneously and actively, consuming energy in the process. Most animals are motile but the term applies to unicellular and simple multicellular organisms, as well as to some mechanisms of fluid flow in multicellular organs, in addition to animal locomotion. Motile marine animals are commonly called free-swimming.
The opposite of motility is sessility.
At the cellular level, different modes of motility exist:
The events that are perceived as movements can be directed:
|This biology article is a stub. You can help Wikipedia by expanding it.|