The Digestive System Your blood circulates through your kidneys many times a day. There was a problem with your submission. The primary role of the loop of Henle is to concentrate the salt in the interstitium, the tissue surrounding the loop. Healthy kidneys filter about a half cup of blood every minute, removing wastes and extra water to make urine. Arteries Renal artery segmental interlobar arcuate interlobular afferent Veins Renal vein Peritubular capillaries Vasa recta arcuate interlobar efferent. Each nephron in the mammalian kidney is a long tubule, or extremely fine tube, about 30—55 mm 1.

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Education, discipline that is concerned with methods of teaching and learning in schools or school-like…. The nephrons found in the kidneys mesonephros of amphibians and most nephrln, and in the late embryonic development of more advanced vertebrates, are only slightly more advanced in structure.

Blood flows into your kidneys through the renal artery and exits through the renal vein. These nephrons are called cortical nephrons.

Your Kidneys & How They Work

Our editors will review what ndphron submitted, and if it meets our criteria, we’ll add it to the article. Aquaporins are membrane proteins that selectively conduct water molecules while preventing the passage of ions and other solutes.


The glomerulus is the network known as a tuftof filtering capillaries located at the vascular pole of the renal corpuscle in Bowman’s capsule.

nephroh The Editors of Encyclopaedia Britannica. The renal corpuscle is the site of the filtration of blood plasma. Blood is filtered by the glomerulus to produce a fluid which is caught by the nephron tubule, called filtrate. Which structures make up the renal corpuscle? Cortical nephrons the majority of nephrons start high in the cortex and have a short loop of Henle which does not penetrate deeply into the medulla.

Nehpron most advanced nephrons occur in the adult kidneys, or metanephrosof land vertebrates, such as reptiles, birds, and mammals.

B: Nephron: The Functional Unit of the Kidney – Biology LibreTexts

The diameter of the efferent arteriole is smaller than that of the afferent, and this difference increases the hydrostatic pressure in the glomerulus. Substances then reabsorb from the latter back to the blood stream. Blood Vessels and Circulation The Bowman’s capsulealso called the glomerular capsule, surrounds the glomerulus.

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41.4B: Nephron: The Functional Unit of the Kidney

As this filtrate passes through the tubule, its composition is altered by the secretion of certain substances into it and by the selective reabsorption of water and other constituents from it. Your ureter carries urine from the kidney to your bladder.

The juxtaglomerular apparatus JGA is a specialized region associated with the nephron, but separate from it. The hypertonicity of the medulla and therefore concentration of urine is determined in part by the size of the loop of Henle. Podocytes, Endothelial cells, and Glomerular mesangial cell are present. The Nervous System and Nervous Tissue Collecting ducts merge as they descend deeper in the medulla to form about 30 terminal ducts, which empty at a papilla.


This last part of the nephron connects with and empties its filtrate into collecting ducts that line the medullary pyramids. Read More on This Topic. Clinical trials look at new ways to prevent, detect, or treat disease.

Nephron | anatomy |

The nephrons work through a two-step process: Retrieved from ” https: The descending loop of Henle consists of an initial short, thick portion and long, thin portion, whereas the ascending loop consists of an initial short, thin portion followed by a long, thick portion. The Peripheral Nervous System You may find it helpful to search within the site to see how similar or related subjects are covered.

Though the collecting duct is normally impermeable to water, it becomes permeable in the presence of antidiuretic hormone ADH. The collecting ducts amass contents from multiple nephrons, fusing together as they enter the papillae of the renal medulla.

Your kidneys also make hormones that help control your blood pressure make red blood cells keep your bones strong and healthy Watch a video about what the kidneys do.