Renal medulla (original) (raw)
اللب الكلوي هو انسجة داخلية في الكلية التي تحدث فيها تنقية الدم من الفضلات النيتروجنية (تكوين البول) يرشح يوميا 200 لتر تقريبا من السائل الراشح في الوحدات الانبوبية الكلوي (اللب الكلوي).
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| dbo:abstract | اللب الكلوي هو انسجة داخلية في الكلية التي تحدث فيها تنقية الدم من الفضلات النيتروجنية (تكوين البول) يرشح يوميا 200 لتر تقريبا من السائل الراشح في الوحدات الانبوبية الكلوي (اللب الكلوي). (ar) La medul·la renal és la part més interna del ronyó, i es divideix en diverses seccions, conegudes com a piràmides, entre les quals hi ha les columnes per on passen els vasos sanguinis. (ca) La médula renal es la parte más interna del riñón en la cual se produce la orina. Contiene millones de nefronas, que se componen de las pirámides renales. En comparación con el fluido que pasa por los túbulos renales, la médula renal tiene una concentración hipertónica, lo que permite la reabsorción de agua. (es) Giltzurrunaren muina edo giltzurrunaren medula Malpighiren piramideek osatzen duten geruza da, giltzurrunaren barrualdekoa. Bertan dago gernubideen zatirik handiena, baita Henleren lakioak eta hodi biltzaileak ere. Egitura horiek guztiek giltzurrun-azalean dauden glomeruluetan dute jarraipena. Giltzurrun-muina giltzurruneko zatirik barnekoena da, eta bertan sortzen da gernua. Milioika nefrona ditu (eu) La médullaire rénale (latin renes medulla = rein moyen) est la partie la plus interne du rein. Elle contient les structures des néphrons responsables du maintien de l'équilibre sanguin en sel et en eau. Ces structures comprennent les vasa rectae (à la fois spuria et vera), les venulae rectae, le plexus capillaire médullaire, l'anse de Henle et le tube collecteur. La médullaire rénale est hypertonique par rapport au filtrat du néphron et facilite la réabsorption de l'eau. La médullaire rénale est divisée en plusieurs sections, appelées les . Le sang pénètre dans le rein par l’artère rénale, qui se sépare pour former les artères interlobaires. Les artères interlobaires se ramifient en artères arquées, qui à leur tour se ramifient pour former des artères interlobulaires et celles-ci atteignent finalement les glomérules. Au niveau du glomérule, le sang atteint un gradient de pression très défavorable et une grande surface d’échange, ce qui force la partie sérique du sang à sortir du vaisseau et à pénétrer dans les tubules rénaux. L'écoulement se poursuit à travers les tubules rénaux, y compris le , l'anse de Henle, à travers le tube distal et quitte finalement le rein par le canal collecteur menant au bassinet rénal, la partie dilatée de l'uretère. Le sang est filtré dans le glomérule par la taille du soluté. Des ions tels que le sodium, le chlorure, le potassium et le calcium sont facilement filtrés, tout comme le glucose. Les protéines ne traversent pas le filtre glomérulaire en raison de leur taille importante et n'apparaissent pas dans le filtrat ni dans l'urine sauf si un processus pathologique a affecté la capsule glomérulaire ou les tubes contournés proximaux et distaux du néphron. Bien que la moelle rénale ne reçoive qu'un faible pourcentage du flux sanguin rénal, l'extraction de l'oxygène y est très élevée, entraînant une faible tension en oxygène et, plus important encore, une sensibilité critique à l'hypotension, à l'hypoxie et au flux sanguin. La médullaire rénale extrait l'oxygène dans un rapport d'environ 80%, ce qui la rend extrêmement sensible aux petites modifications du débit sanguin rénal. Les mécanismes de nombreuses lésions rénales péri-opératoires reposent sur la perturbation du débit sanguin normal (et donc de l'apport en oxygène) dans la médullaire rénale. (fr) The renal medulla is the innermost part of the kidney. The renal medulla is split up into a number of sections, known as the renal pyramids. Blood enters into the kidney via the renal artery, which then splits up to form the segmental arteries which then branch to form interlobar arteries. The interlobar arteries each in turn branch into arcuate arteries, which in turn branch to form interlobular arteries, and these finally reach the glomeruli. At the glomerulus the blood reaches a highly disfavourable pressure gradient and a large exchange surface area, which forces the serum portion of the blood out of the vessel and into the renal tubules. Flow continues through the renal tubules, including the proximal tubule, the Loop of Henle, through the distal tubule and finally leaves the kidney by means of the collecting duct, leading to the renal pelvis, the dilated portion of the ureter. The renal medulla (Latin: medulla renis 'marrow of the kidney') contains the structures of the nephrons responsible for maintaining the salt and water balance of the blood. These structures include the vasa rectae (both spuria and vera), the venulae rectae, the medullary capillary plexus, the loop of Henle, and the collecting tubule. The renal medulla is hypertonic to the filtrate in the nephron and aids in the reabsorption of water. Blood is filtered in the glomerulus by solute size. Ions such as sodium, chloride, potassium, and calcium are easily filtered, as is glucose. Proteins are not passed through the glomerular filter because of their large size, and do not appear in the filtrate or urine unless a disease process has affected the glomerular capsule or the proximal and distal convoluted tubules of the nephron. Though the renal medulla only receives a small percentage of the renal blood flow, the oxygen extraction is very high, causing a low oxygen tension and more importantly, a critical sensitivity to hypotension, hypoxia, and blood flow. The renal medulla extracts oxygen at a ratio of ~80% making it exquisitely sensitive to small changes in renal blood flow. The mechanisms of many perioperative renal insults are based on the disruption of adequate blood flow (and therefore oxygen delivery) to the renal medulla. (en) La midollare renale (o midollare del rene) è la parte centrale del rene. (it) Medula renal é a parte mais interna do rim localizado entre o córtex renal e a pélvis. Ela contém numerosos tubos coletores de urina. Sendo responsável pela filtração da urina, na medula renal humana existem milhares de néfrons que executam essa ação. Já nos animais o gato é o animal que se mais tem problemas renais pela baixa quantidade de néfrons. (pt) |
| dbo:latinName | Medulla renalis Pyramides renales |
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| dbp:latin | Medulla renalis (en) Pyramides renales (en) |
| dbp:name | Renal medulla (en) Renal pyramids (en) |
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| rdfs:comment | اللب الكلوي هو انسجة داخلية في الكلية التي تحدث فيها تنقية الدم من الفضلات النيتروجنية (تكوين البول) يرشح يوميا 200 لتر تقريبا من السائل الراشح في الوحدات الانبوبية الكلوي (اللب الكلوي). (ar) La medul·la renal és la part més interna del ronyó, i es divideix en diverses seccions, conegudes com a piràmides, entre les quals hi ha les columnes per on passen els vasos sanguinis. (ca) La médula renal es la parte más interna del riñón en la cual se produce la orina. Contiene millones de nefronas, que se componen de las pirámides renales. En comparación con el fluido que pasa por los túbulos renales, la médula renal tiene una concentración hipertónica, lo que permite la reabsorción de agua. (es) Giltzurrunaren muina edo giltzurrunaren medula Malpighiren piramideek osatzen duten geruza da, giltzurrunaren barrualdekoa. Bertan dago gernubideen zatirik handiena, baita Henleren lakioak eta hodi biltzaileak ere. Egitura horiek guztiek giltzurrun-azalean dauden glomeruluetan dute jarraipena. Giltzurrun-muina giltzurruneko zatirik barnekoena da, eta bertan sortzen da gernua. Milioika nefrona ditu (eu) La midollare renale (o midollare del rene) è la parte centrale del rene. (it) Medula renal é a parte mais interna do rim localizado entre o córtex renal e a pélvis. Ela contém numerosos tubos coletores de urina. Sendo responsável pela filtração da urina, na medula renal humana existem milhares de néfrons que executam essa ação. Já nos animais o gato é o animal que se mais tem problemas renais pela baixa quantidade de néfrons. (pt) La médullaire rénale (latin renes medulla = rein moyen) est la partie la plus interne du rein. Elle contient les structures des néphrons responsables du maintien de l'équilibre sanguin en sel et en eau. Ces structures comprennent les vasa rectae (à la fois spuria et vera), les venulae rectae, le plexus capillaire médullaire, l'anse de Henle et le tube collecteur. La médullaire rénale est hypertonique par rapport au filtrat du néphron et facilite la réabsorption de l'eau. (fr) The renal medulla is the innermost part of the kidney. The renal medulla is split up into a number of sections, known as the renal pyramids. Blood enters into the kidney via the renal artery, which then splits up to form the segmental arteries which then branch to form interlobar arteries. The interlobar arteries each in turn branch into arcuate arteries, which in turn branch to form interlobular arteries, and these finally reach the glomeruli. At the glomerulus the blood reaches a highly disfavourable pressure gradient and a large exchange surface area, which forces the serum portion of the blood out of the vessel and into the renal tubules. Flow continues through the renal tubules, including the proximal tubule, the Loop of Henle, through the distal tubule and finally leaves the kidney b (en) |
| rdfs:label | لب كلوي (ar) Medul·la renal (ca) Médula renal (es) Giltzurrunaren muin (eu) Médullaire rénale (fr) Midollare renale (it) Renal medulla (en) Medula renal (pt) |
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| foaf:name | Renal medulla (en) Renal pyramids (en) |
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