Editing Motility (section)

==Movements==
{{See also |Taxis}}

Events perceived as movements can be directed:
* along a chemical gradient (see [[chemotaxis]])
* along a temperature gradient (see [[thermotaxis]])
* along a light gradient (see [[phototaxis]])
* along a magnetic field line (see [[magnetotaxis]])
* along an electric field (see [[galvanotaxis]])
* along the direction of the gravitational force (see [[gravitaxis]])
* along a rigidity gradient (see [[durotaxis]])
* along a gradient of cell adhesion sites (see [[haptotaxis]])
* along other cells or [[biopolymer]]s

<gallery>
File:Muscular system.svg|Muscles give the ability for voluntary movement, and involuntary movement as in [[muscle spasm]]s and [[reflex]]es. At the level of the [[muscular system]], motility is a synonym for [[Animal locomotion|locomotion]].<ref>{{cite book |last1=Parsons |first1=Richard |title=A2-level biology : the revision guide : exam board: Edexcel |date=2009 |publisher=Coordination Group Publications |location=Broughton-in-Furness |isbn=978-1-84762-264-8 |page=50 |chapter=Unit 5 Section 1 |quote='''Skeletal muscle is the type of muscle you use to move''', e.g. the '''bicep and triceps move the lower arm'''. Skeletal muscles are attached to bones by tendons. Ligaments attach bones to other bones, to hold them together. '''Skeletal muscles contract and relax to move bones at a joint.'''}}</ref><ref>{{cite book |last1=Vannini |first1=Vanio |last2=Jolly |first2=Richard T. |last3=Pogliani |first3=Giuliano |title=The new atlas of the human body : a full color guide to the structure of the body. |date=1994 |publisher=Chancellor Press |location=London |isbn=978-1-85152-984-1 |page=25 |quote='''The muscle mass is not just concerned with locomotion.''' It assists in the circulation of blood and protects and confines the visceral organs. It also provides the main shaping component of the human form.}}</ref>
File:Sperm-20051108.jpg|Most [[sperm]] have a single [[flagellum]] to help them swim. The [[cervix|cervical]], [[uterus|uterine]], and [[fallopian tubes|fallopian]] linings of the female [[reproductive system]] play a more important role in transporting sperm to [[Ovum|ova]].
File:Cheetah chase.jpg|The record speeds cheetahs hold are owed in large to their muscle motility.
File:Phototropism.jpg|The shoots of plants move by growing towards light. This is known as [[phototropism|positive phototropism]]. The roots grow away from light. This is known as negative phototropism.
File:FAGOCITOSI BY RAFF.gif|[[Monocyte]]s and [[macrophage]]s of the [[immune system]] engulf [[Bacteria]] by extending their [[pseudopodia]]. Note that this cartoon is not an accurate representation of [[phagocytosis]].
File:Protein translation.gif|Motility at the sub-cellular level. This depicts [[translation (biology)|translation]] - a motile [[Nanoscopic scale|nanoscale]] molecular process using [[protein dynamics]]. 
</gallery>