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Encyclopedia > Connecting tubule
Connecting tubule
Scheme of renal tubule and its vascular supply.
Latin tubulus renalis arcuatus
Gray's subject #253 1223
Precursor Metanephric blastema
Dorlands/Elsevier t_22/12830099

In the kidney, the collecting tubule (CNT, or junctional tubule, or arcuate renal tubule) is a tubular segment of the renal collecting duct system that connects the distal convoluted tubule to the cortical collecting duct. Image File history File links Gray1128. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... This article or section is in need of attention from an expert on the subject. ... The Metanephric blastema (or metanephric mesenchyme) is one of the two embryological structures that give rise to the kidney (the other is the ureteric bud. ... Elseviers logo Elsevier, the worlds largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. ... Human kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ... The collecting duct system of the kidney consists of: The connecting tubule The cortical collecting duct The medullary collecting duct Categories: | ... Kidney nephron The distal convoluted tubule (DCT) is a portion of kidney nephron between the loop of Henle and the collecting duct system. ... The collecting duct system of the kidney consists of a series of tubules and ducts that connect the nephrons to the ureter. ...

Contents

Classification

Many sources include the connecting tubule as part of the collecting duct system. However, the embryological origin is more similar to the nephron than it is to the rest of the collecting duct (which derives from the ureteric bud), and other sources therefore classify the connecting tubule with the nephron. Nephron of the kidney A nephron is the basic structural and functional unit of the kidney. ... The Ureteric bud is a portion of the mesonephric duct. ...


Naming

Some connecting tubules, usually associated with juxtamedullary nephrons, arch upwards before reaching the cortical collecting ducts. It is this "arcuate" feature which gives the tubule its alternate name. Nephron of the kidney A nephron is the basic structural and functional unit of the kidney. ...


Function

It participates in the regulation of water and electrolytes, including sodium, and chloride. Water is a tasteless, odourless substance that is essential to all known forms of life and is known as the universal solvent. ... An electrolyte is a substance that dissociates into free ions when dissolved (or molten), to produce an electrically conductive medium. ... General Name, Symbol, Number sodium, Na, 11 Chemical series alkali metals Group, Period, Block 1, 3, s Appearance silvery white Atomic mass 22. ... The chloride ion is formed when the element chlorine picks up one electron to form an anion (negatively-charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and are also called chlorides. ...


The CNT is sensitive to both isoprotenerol (more so than the cortical collecting ducts) and antidiuretic hormone (less so than the cortical collecting ducts), the latter largely determining its function in water reabsorption. Antidiuretic hormone (ADH), or arginine vasopressin (AVP), is a peptide hormone produced by the hypothalamus, and stored in the posterior part of the pituitary gland. ...


References

  • Eaton, Douglas C., Pooler, John P. (2004). Vander's Renal Physiology, 6th edition, Lange Medical Books/McGraw-Hill. ISBN 0-07-135728-9.
  • Imai M (1979). "The connecting tubule: a functional subdivision of the rabbit distal nephron segments". Kidney Int 15 (4): 346-56. PMID 513494.

External links

Urinary system - Kidney - edit
Renal fascia | Renal capsule | Renal cortex  (Renal column) | Renal medulla (Renal sinusRenal pyramids) | Renal lobe | Cortical lobule | Medullary ray | Nephron 
afferent circulation: Renal artery → Interlobar arteries → Arcuate arteries → Cortical radial arteries → Afferent arterioles → Renal corpuscle (GlomerulusBowman's capsule)

kidney tubule: Proximal tubule → Loop of Henle (Descending, Thin ascending, Thick ascending)  → Distal convoluted tubule → Connecting tubule → Collecting ducts → Duct of Bellini → Renal papilla → Minor calyx → Major calyx → Renal pelvis → Ureter In 1828 the Medical Academy of Georgia was chartered by the state of Georgia with plans to offer a single course of lectures leading to a bachelors degree. ... The urinary system is the organ system that produces, stores, and carries urine. ... Human kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ... The renal capsule is a tough fibrous layer surrounding the kidney and covered in a thick layer of perinephric adipose tissue. ... The renal cortex is the outer portion of the kidney between the renal capsule and the renal medulla. ... The renal column is tissue between the renal pyramids that allows for support of the renal cortex. ... The renal medulla is the innermost part of the kidney. ... The renal sinus is a cavity within the kidney which is occupied by the renal pelvis, renal calices, blood vessels, nerves and fat. ... Renal pyramids are cone-shaped tissues of the kidney. ... Nephron of the kidney A nephron is the basic structural and functional unit of the kidney. ... Grays Fig. ... Human kidneys viewed from behind with spine removed The renal arteries normally arise off the abdominal aorta and supply the kidneys with blood. ... The arcuate arteries of the kidney are vessels of the renal circulation. ... The afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems. ... A renal corpuscle is the initial filtering component of a nephron in the kidney. ... Glomerulus refers to two unrelated structures in the body, both named for their globular form. ... The Bowmans capsule is a blind sac at the beginning of a the tubular component of a nephron in the mammalian kidney. ... In the biology of the kidney, the proximal convoluted tubule is the segment of the renal tubule that drains Bowmans capsule. ... In the kidney, the loop of Henle is the portion of the nephron that leads from the proximal convoluted tubule to the distal convoluted tubule. ... Kidney nephron The distal convoluted tubule (DCT) is a portion of kidney nephron between the loop of Henle and the collecting duct system. ... The collecting duct system of the kidney consists of: The connecting tubule The cortical collecting duct The medullary collecting duct Categories: | ... Position of the duct of Bellini in the kidney The duct of Bellini is an anatomical structure of the kidneys, also known as papillary duct. ... The renal pelvis represents the dilated proximal part of the ureter. ... Transverse section of ureter. ...


efferent circulation: Glomerulus → Efferent arterioles → Peritubular capillaries/Vasa recta → Arcuate veinInterlobar veinsRenal vein Grays Fig. ... The glomerulus is a capillary bed found surrounded by the Bowmans capsule of the nephron in the vertebrate kidney. ... The Efferent arterioles are a group of blood vessels that are part of the urinary system of many animals. ... A nephron, the vasa recta is labelled arteria recta In the blood supply of the kidney, the vasa recta form a series of straight capillaries (recta is from the Latin for straight) that descend from the cortex into the medulla. ... The arcuate vein is a vessel of the renal circulation. ... Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ...


juxtaglomerular apparatus: Macula densaJuxtaglomerular cells, Extraglomerular mesangial cells The juxtaglomerular apparatus is a renal structure consisting of the macula densa, mesangial cells, and juxtaglomerular cells. ... In the kidney, the macula densa is an area of closely packed specialized cells lining the distal convoluted tubule where it lies next to the glomerular vascular pole. ... The juxtaglomerular cells are specialized cells that stimulate the secretion of the adrenal hormone aldosterone and play a major role in renal autoregulation, the kidneys self-governance. ...

Renal physiology
Filtration - Ultrafiltration | Countercurrent exchange | Glomerular basement membrane | Podocyte | Filtration slits | Intraglomerular mesangial cells

Hormones affecting filtration - Antidiuretic hormone (ADH) | Aldosterone | Atrial natriuretic peptide Renal physiology is the study of the physiology of the kidneys. ... In chemistry, alchemy and water treatment, filtration is the process of using a filter to mechanically separate a mixture. ... Ultrafiltration (UF) is a variety of membrane filtration in which hydrostatic pressure forces a liquid against a semipermeable membrane. ... Countercurrent exchange is a mechanism used to transfer some component of a fluid from one flowing current of fluid to another across a permeable barrier between them. ... The glomerular basement membrane is the basal laminal portion of the glomerulus which performs the actual filtration though the filtration slits between the podocytes , separating the blood on the inside from the urine on the outside. ... Podocytes are cells of the visceral epithelium in the kidneys and form a crucial component of the glomerular filtration barrier by covering the exterior basement surface of the glomerular capillary and maintaining a massive filtration surface. ... Antidiuretic hormone (ADH), or arginine vasopressin (AVP), is a peptide hormone produced by the hypothalamus, and stored in the posterior part of the pituitary gland. ... Aldosterone is a steroid hormone synthesized from cholesterol by the enzyme aldosterone synthase. ... Atrial natriuretic factor (ANF), atrial natriuretic peptide (ANP) or atriopeptin, is a polypeptide hormone involved in the homeostatic control of body water and sodium. ...


Endocrine - Renin | Erythropoietin (EPO) | Calcitriol (Active vitamin D) | Prostaglandins The endocrine system is a control system of ductless endocrine glands that secrete chemical messengers called hormones that circulate within the body via the bloodstream to affect distant organs. ... Renin, also known as angiotensinogenase, is a circulating enzyme (EC 3. ... Erythropoietin Erythropoietin (or EPO) is a glycoprotein hormone that is a growth factor for erythrocyte (red blood cell) precursors in the bone marrow. ... Vitamin D is a fat soluble vitamin that contributes to the maintenance of normal levels of calcium and phosphorus in the bloodstream. ... Chemical structure of prostaglandin E1 (PGE1). ...

Assessing Renal function / Measures of dialysis
Glomerular filtration rate | Creatinine clearance | Renal clearance ratio | Urea reduction ratio | Kt/V | Standardized Kt/V | Hemodialysis product

  Results from FactBites:
 
Collecting duct system - Wikipedia, the free encyclopedia (609 words)
It is adjacent to the distal convoluted tubule, the most distal segment of the renal tubule.
Connecting tubules from several adjacent nephrons merge to form cortical collecting tubules, and these may join to form cortical collecting ducts.
For the connecting tubules, this specific cell type is the connecting tubule cell; for the collecting ducts, it is the principal cell.
Dorlands Medical Dictionary (4429 words)
mesonephric t.’s the tubules constituting the mesonephros of the embryo of an amniote.
contor´tus dista´lis distal convoluted tubule: a distal, convoluted part of the ascending limb of the renal tubule, extending from the distal straight tubule to the connecting tubule.
rec´tus dista´lis distal straight tubule: part of the renal tubule that is primarily on ascending limb and extends from the thin tubule to the distal convoluted tubule.
  More results at FactBites »

 
 

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