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Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration

Physiology of the Genitourinary System I: Renal Blood Flow and Glomerular Filtration

The kidneys are vital organs responsible for regulating blood filtration, waste excretion, and fluid balance, all of which are crucial for maintaining homeostasis. Renal physiology examines renal blood flow, glomerular filtration, and urine formation, ensuring the body’s internal environment remains stable.Renal Blood FlowThe kidneys receive about 20-25% of the cardiac output, typically around 1200 mL of blood per minute in an average adult. Blood flows into the kidneys through the renal...

Kidney Structure

Kidney Structure

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.

Physiology of the Genitourinary System II: Tubular Reabsorption and Secretion

Physiology of the Genitourinary System II: Tubular Reabsorption and Secretion

The kidneys maintain homeostasis through filtration, reabsorption, and secretion. Tubular reabsorption and secretion are crucial in forming urine and regulating electrolytes, water balance, and waste elimination.Tubular Reabsorption and Secretion ProcessesTubular reabsorption is the process that reclaims essential substances such as electrolytes, glucose, amino acids, and water from the glomerular filtrate back into the bloodstream. This is achieved through passive and active transport...

Anatomy of the Genitourinary System I: Kidneys and Ureters

Anatomy of the Genitourinary System I: Kidneys and Ureters

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...

Internal Anatomy of the Kidney

Internal Anatomy of the Kidney

The kidneys are essential organs in the human body, performing a myriad of tasks that maintain homeostasis and overall health.
Anatomical Position and Dimensions
The kidneys are retroperitoneal organs positioned against the posterior abdominal wall on either side of the spine, roughly between the twelfth thoracic and third lumbar vertebrae. Each kidney is typically 10-12 cm long, 5-6 cm wide, and 3-4 cm thick, weighing about 150 grams.
Renal Cortex
The outermost region of the kidney is the...

External Anatomy of the Kidney

External Anatomy of the Kidney

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.
The kidneys are located in the retroperitoneal space on either side of the vertebral column, protected posteriorly by the 11th and 12th ribs. The right kidney sits slightly lower than the left owing to the presence of the liver...

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Related Experiment Video

Updated: Jun 8, 2026

Generation of Human Kidney Tubuloids from Tissue and Urine

Generation of Human Kidney Tubuloids from Tissue and Urine

Published on: April 16, 2021

Kidney modeling and systems physiology.

S Randall Thomas¹

¹IBISC CNRS FRE 3190 and University of Evry, Tour Evry 2, 91000 Evry, France.

Wiley Interdisciplinary Reviews. Systems Biology and Medicine

|September 14, 2010

Summary

This summary is machine-generated.

This study reviews current renal systems physiology resources and outlines a path toward a comprehensive renal physiome. It highlights existing models and databases essential for collaborative renal systems biology.

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Isolation of Primary Human Proximal Tubule Epithelial Cells and Their Use in Creating a Microphysiological Model of the Renal Proximal Tubule

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Area of Science:

Physiology
Computational Biology
Systems Biology

Background:

Existing computational models cover renal cell types, nephron segments, and medullary exchanges.
Studies have addressed renal hemodynamics, tubuloglomerular feedback, and autoregulation.
Recent anatomical data offer new insights into unresolved renal physiology problems.

Purpose of the Study:

To provide an overview of current renal systems physiology resources.
To identify developmental directions for the renal physiome.
To establish a foundation for a collaborative renal systems biology infrastructure.

Main Methods:

Summarizing legacy modeling studies in renal physiology.
Reviewing detailed anatomical reconstructions.
Assessing progress in quantitative databases and model repositories.

Main Results:

Comprehensive models of renal cell types and nephron segments exist.
Models of nephro-vascular exchanges, hemodynamics, and feedback mechanisms are available.
Progress in databases and repositories supports a collaborative infrastructure.

Conclusions:

Existing resources provide a strong foundation for the renal physiome.
Further development of databases and repositories is crucial.
Integration with the IUPS Physiome Project is a future prospect.