Editing Tubule (section)

==Examples of tubules==
* [[Collecting tubules]]: terminal channels of the [[nephrons]]<ref name="Free Online Medical Dictionary">{{cite web|title=Tubule|url=http://medical-dictionary.thefreedictionary.com/tubule|publisher=Free Online Medical Dictionary|access-date=April 10, 2012}}</ref>
* [[Cuvierian tubules]]:  clusters of sticky tubules located at the base of the respiratory tree, which may be discharged by some [[sea cucumbers]] ([[holothurians]]) when mechanically stimulated (i.e. being threatened by a predator)<ref name="Oceanography Dictionary">{{cite web|title=Cuvierian tubules|url=http://www.experiencefestival.com/a/Cuvierian_tubules/id/6076055|publisher=Oceanography Dictionary|access-date=April 13, 2012}}</ref>
* Dentinal tubules or [[dental canaliculi]]: minute channels in the dentine of a [[tooth]] that extend from the [[pulp cavity]] to the cementum or the [[Tooth enamel|enamel]]<ref name="Free Online Medical Dictionary" />
* [[Distal convoluted tubule]]: the convoluted portion of the vertebrate [[nephron]] that lies between the loop of Henle and the nonsecretory part of the [[nephron]] and that is concerned especially with the concentration of [[urine]]<ref name=Merriam-Webster />
* Galactophorous tubule or [[lactiferous ducts]]: small channels for the passage of milk from the secreting cells in the [[mammary gland]] to the [[nipple]]<ref name="Free Online Medical Dictionary" />
* [[Loop of Henle]]: the long U-shaped part of the renal tubule, extending through the medulla from the end of the [[proximal convoluted tubule]]. It begins with a descending limb (comprising the proximal straight tubule and the thin tubule ), followed by the ascending limb (the distal straight tubule ), and ending at the [[distal convoluted tubule]]<ref name="Free Online Dictionary" />
* [[Malpighian tubule]]: any of the excretory organs in [[insects]] that lie in the [[abdominal body cavity]] and empty into the junction between the [[midgut]] and [[hindgut]]<ref name="Britannica Online Encyclopedia">{{cite web|title=Malpighian tubule|url=http://www.britannica.com/EBchecked/topic/360506/malpighian-tubule|publisher=Britannica Online Encyclopedia|access-date=April 10, 2012}}</ref>
* [[Mesonephric tubule]]: tubules comprising the mesonephros or temporary [[kidney]] of amniotes
* Metanephric tubule: tubules comprising the permanent [[kidney]] of amniotes<ref name="Free Online Medical Dictionary" />
* [[Microtubule]]: a microscopically small tubule<ref name="Free Online Dictionary" />
* [[Proximal convoluted tubule]]: the portion of the [[nephron]] immediately after the [[Glomerulus (kidney)|glomerulus]]
* [[Renal tubule]]: the minute canals made up of [[basement membrane]] and lined with [[epithelium]], composing the substance of the [[kidney]] and secreting, reabsorbing, collecting and conducting the [[urine]]. Include proximal convoluted, the nephron loop (containing the proximal straight tubule, descending and ascending thin, and the distal straight tubules) and the [[distal convoluted tubules]]<ref name="Free Online Medical Dictionary" />
* [[Seminiferous tubules]]: any of the numerous long convoluted tubules in the [[testis]] which are the sites where [[spermatozoa]] mature
* [[T tubule]]: transverse [[intracellular]] tubules invaginating from the [[cell membrane]] and surrounding the [[myofibrils]] of the T system of skeletal and cardiac muscle, serving as a pathway for the spread of electrical excitation within a [[muscle cell]]
* [[Invertebrate trachea|Trachea]]: tubules forming the [[respiratory system]] of most [[insects]] and many [[arachnids]]
* Uriniferous tubules: any of the small tubules that are the excretory units of the vertebrate [[kidney]]
* Uveoscleral pathway: a tubule that drains excess [[aqueous humor]]
* [[Vasa efferentia]]: convoluted tubules that lead from the [[rete testis]] to the [[vas deferens]] and form the head of the [[epididymis]]<ref name="Free Online Dictionary" />
* [[Vesicular-tubular clusters]] between the [[golgi apparatus]] and [[endoplasmic reticulum]] which assist in transport.<ref>{{Cite book|last=Alberts|first=Bruce|title=Molecular Biology of the Cell|publisher=Garland Science|year=2002|isbn=0-8153-4072-9|pages=729-730}}</ref>