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Concept
Tubule
Summary
In biology, a tubule is a general term referring to small tube or similar type of structure. Specifically, tubule can refer to:
a small tube or fistular structure
a minute tube lined with glandular epithelium
any hollow cylindrical body structure
a minute canal found in various structures or organs of the body
a slender elongated anatomical channel
a minute tube, especially as an anatomical structure.
Collecting tubules: terminal channels of the nephrons
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)
Dentinal tubules or dental canaliculi: minute channels in the dentine of a tooth that extend from the pulp cavity to the cementum or the enamel
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
Galactophorous tubule or lactiferous ducts: small channels for the passage of milk from the secreting cells in the mammary gland to the nipple
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
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
Mesonephric tubule: tubules comprising the mesonephros or temporary kidney of amniotes
Metanephric tubule: tubules comprising the permanent kidney of amniotes
Microtubule: a microscopically small tubule
Proximal convoluted tubule: the portion of the nephron immediately after the 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.
Official source
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