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In biology, motility is the ability to move spontaneously and actively, consuming energy in the process.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Motility is genetically determined<ref>{{#invoke:citation/CS1|citation |CitationClass=book }}</ref> (see genetic determinism) but may be affected by environmental factors. For instance, muscles give animals motility but the consumption of hydrogen cyanide (the environmental factor in this case) would adversely affect muscle physiology causing them to stiffen leading to rigor mortis.<ref>{{#invoke:citation/CS1|citation |CitationClass=book }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=book }}</ref><ref>{{#invoke:Citation/CS1|citation |CitationClass=journal }}</ref> 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.<ref>{{#invoke:Citation/CS1|citation |CitationClass=journal }}</ref><ref>{{#invoke:Citation/CS1|citation |CitationClass=journal }}</ref><ref>{{#invoke:Citation/CS1|citation |CitationClass=journal }}</ref>

Motility may also refer to an organism's ability to move food through its digestive tract, i.e., peristaltics (gut motility, intestinal motility, etc.).<ref>Intestinal Motility Disorders at eMedicine</ref>


Motility sections
Intro  Cellular-level motility  Movements  See also  References  

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