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Encyclopedia > Vasa recta
A nephron, the vasa recta is labelled arteria recta
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. These vessels branch off of the efferent arterioles of juxtamedullary nephrons (those nephrons closest to the medulla), enter the medulla, and surround the loop of Henle. A nephron of the kidney. ... A nephron of the kidney. ... Grays Fig. ... Latin was the language originally spoken in the region around Rome called Latium. ... The renal cortex is the outer portion of the kidney between the renal capsule and the renal medulla. ... The renal medulla is the innermost part of the kidney. ... The Efferent arterioles are a group of blood vessels that are part of the urinary system of many animals. ... Nephron of the kidney A nephron is the basic structural and functional unit of the kidney. ... Nephron of the kidney A nephron is the basic structural and functional unit of the kidney. ... 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. ...


Each of the vasa recta has a hairpin turn in the medulla and carries blood at a very slow rate, two factors crucial in the maintenance of countercurrent exchange that prevent washout of the concentration gradients established in the renal medulla. The maintenance of this concentration gradient is one of the components responsible for the kidney's ability to produce concentrated urine. 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. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...


The slow blood flow in vasa recta makes them a likely place of thrombosis in hypercoagulable states, or erythrocyte sickling in sickle cell disease. Ischemia that results may lead to renal papillary necrosis. Thrombosis is the formation of a clot or thrombus inside a blood vessel, obstructing the flow of blood through the circulatory system. ... ... In medicine, ischemia (Greek ισχαιμία, isch- is restriction, hema or haema is blood) is a restriction in blood supply, generally due to factors in the blood vessels, with resultant damage or dysfunction of tissue. ...

Urinary system - Kidney - edit
Renal capsule | Renal cortex | Renal medulla (Renal sinusRenal pyramids) | Renal calyx | Renal pelvis
Nephron - Renal corpuscle (GlomerulusBowman's capsule) → Proximal tubule → Loop of Henle → Distal convoluted tubule → Collecting ducts

Juxtaglomerular apparatus (Macula densaJuxtaglomerular cells) 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 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. ... A calyx is a part in the kidney. ... The renal pelvis represents the dilated proximal part of the ureter. ... Nephron of the kidney A nephron is the basic structural and functional unit of the kidney. ... 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. ... Bowmans Capsule is a blind sac at the beginning of a the tubular component of a nephron in the mammalian kidney. ... 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: | ... 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 circulation - Renal artery → Interlobar arteries → Arcuate arteries → Cortical radial arteries → Afferent arterioles → Glomerulus → Efferent arterioles → Vasa recta → Arcuate vein → Renal vein 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 afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems. ... 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. ... Kidneys viewed from behind with spine removed The kidneys are bean-shaped excretory organs in vertebrates. ...

Renal physiology
Filtration - Ultrafiltration | Countercurrent exchange

Hormones effecting 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 pressure-driven membrane process for purifying and concentrating macromolecular (10^3 - 10^6 Da) solutions, especially protein solutions. ... 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. ... 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


Vasa rectas are also straight arteries coming off from arcades in the mesentery of the jejunum and ileum, and heading toward the intestines. Arcaded is an anatomosis of the jejunal and elial arteries, branches of superior mesenteric artery. In medicine (nephrology) renal function is an indication of the state of the kidney and its role in physiology. ... In nephrology, dialysis adequacy is the measurement of renal dialysis for the purpose of determining dialysis treatment regime and to better understand the pathophysiology of renal dialysis. ... Glomerular filtration rate (GFR) is the volume of fluid filtered from the renal glomerular capillaries into Bowmans capsule per unit time. ... Creatinine clearance is a method that estimates the glomerular filtration rate (GFR) of the kidneys. ... The renal clearance ratio is found with the following equation: X is the analyte substance Cx is the renal plasma clearance of X Cin is the renal plasma clearance of inulin. ... The urea reduction ratio (URR), is a dimensionless number used to quantify hemodialysis treatment adequacy. ... Kt/V - a dimensionless number used to quantify hemodialysis and peritoneal dialysis treatment adequacy. ... Standardized Kt/V, also std Kt/V, is a way of measuring (renal) dialysis adequacy. ... Hemodialysis product (HDP) - is a number used to quantify hemodialysis and peritoneal dialysis treatment adequacy. ...


 
 

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