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Related Concept Videos

External Anatomy of the Kidney01:21

External Anatomy of the Kidney

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The kidneys are a pair of bean-shaped organs in the human body that play a critical role in maintaining overall health. They filter out waste products from the blood, regulate blood pressure, maintain electrolyte balance, and stimulate the production of red blood cells.
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Kidney Structure01:45

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The kidneys are two large bean-shaped organs located in the upper abdomen. They filter the blood several times a day to remove toxins and rebalance water and electrolytes of the circulatory system via the renal veins. The kidneys receive blood directly from the heart via the renal arteries. These arteries enter the kidney at the hilum, the concave surface of the bean, where they branch and divide into smaller vessels and capillaries.
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Internal Anatomy of the Kidney01:12

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The kidneys are essential organs in the human body, performing a myriad of tasks that maintain homeostasis and overall health.
Anatomical Position and Dimensions
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Renal Cortex
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Anatomy of the Genitourinary System I: Kidneys and Ureters01:11

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The upper urinary system comprises two kidneys and two ureters, which are crucial in filtering blood and forming urine.KidneysLocation and Structure:The kidneys are two bean-shaped organs positioned behind the peritoneum on either side of the spine.Kidneys are between the 12th thoracic (T12) and the 3rd lumbar (L3) vertebrae.The position of the liver causes the right kidney to sit slightly lower than the left.Protective Layers:Each kidney is enveloped in a tough, fibrous membrane called the...
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Blood and Nerve Supply to the Kidney01:18

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The kidneys are vital organs responsible for filtering and cleaning blood, removing waste products, and regulating electrolyte levels. To perform these essential functions, they require a constant and robust blood supply.
Bloody Supply to the Kidneys:
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Renal Corpuscle01:20

Renal Corpuscle

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The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
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Updated: Mar 12, 2026

Author Spotlight: Developing a Bedside Protocol for Kidney and Genitourinary Ultrasonography
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Author Spotlight: Developing a Bedside Protocol for Kidney and Genitourinary Ultrasonography

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The gut-kidney axis.

Pieter Evenepoel1,2,3, Ruben Poesen4,5, Björn Meijers4,5

  • 1Laboratory of Nephrology, Department of Immunology and Microbiology, KU Leuven, Leuven, Belgium. Pieter.Evenepoel@uzleuven.be.

Pediatric Nephrology (Berlin, Germany)
|November 17, 2016
PubMed
Summary
This summary is machine-generated.

The gut microbiota influences chronic kidney disease (CKD) by producing toxins. Targeting these microbial metabolites offers a potential therapeutic strategy for CKD patients.

Keywords:
Chronic kidney diseaseHost–gut microbiota interactionMicrobial metabolismMicrobiomeUremic toxins

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Area of Science:

  • Microbiology
  • Nephrology
  • Physiology

Background:

  • Host-gut microbiota interactions are crucial for mammalian physiology.
  • Dysbiosis and microbial metabolites play a role in chronic kidney disease (CKD) pathogenesis.
  • Uremia alters gut microbiota composition and metabolism, leading to toxin production.

Purpose of the Study:

  • To explore the pathophysiological relevance of host-gut microbiota crosstalk in CKD.
  • To identify microbial-derived uremic toxins and their toxicological impact.
  • To discuss potential therapeutic strategies targeting these toxins in CKD.

Main Methods:

  • Review of existing literature on host-gut microbiota interactions in CKD.
  • Analysis of the bidirectional relationship between uremia and gut microbiota.
  • Identification and characterization of key microbial metabolites (uremic toxins).

Main Results:

  • Uremia alters gut microbiota, promoting proteolytic fermentation.
  • Key uremic toxins like indoxyl sulfate, p-cresyl sulfate, and trimethylamine-N-oxide originate from microbial metabolism.
  • These toxins exhibit significant vascular and renal toxicity in CKD.

Conclusions:

  • Microbial metabolites are significant contributors to CKD pathophysiology.
  • Targeting these uremic toxins via dietary therapy, prebiotics, probiotics, or enzyme inhibitors is a promising adjuvant therapeutic approach.
  • Further randomized controlled trials are needed to validate these interventions.