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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...

Anatomy of the Genitourinary System II: Bladder and Urethra

Anatomy of the Genitourinary System II: Bladder and Urethra

The lower urinary system consists of the urinary bladder and urethra, which are essential in storing and expelling urine from the body. Together with the internal and external sphincters, these structures work together to regulate urination effectively.Anatomy of the BladderThe urinary bladder is a muscular, stretchable organ behind the pubic bone and in front of the rectum. In females, the bladder is positioned anterior to the vagina and inferior to the uterus, while in males, it is located...

Microbiota of the Urogenital Tract

Microbiota of the Urogenital Tract

The human urogenital system, once thought to be sterile in healthy individuals, is now recognized as a complex microbial habitat. Advancements in molecular sequencing techniques have revealed that even in healthy adults, the kidneys and bladder harbor microbial populations similar to those found in the distal urethra, albeit in much lower abundance. These resident microorganisms, while generally innocuous, can become opportunistic pathogens under conditions that alter the urogenital...

Imaging Studies I: Kidney, Ureter, and Bladder Studies

Imaging Studies I: Kidney, Ureter, and Bladder Studies

Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...

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...

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...

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Related Experiment Video

Updated: Jul 7, 2026

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection

Published on: October 12, 2017

GUDMAP: the genitourinary developmental molecular anatomy project.

Andrew P McMahon¹, Bruce J Aronow, Duncan R Davidson

¹Department of Molecular and Cellular Biology and Harvard Stem Cell Institute, Harvard University, 16, Divinity Avenue, Cambridge, MA 02138, USA. amcmahon@mcb.harvard.edu

Journal of the American Society of Nephrology : JASN

|February 22, 2008

Summary

The Genitourinary Developmental Molecular Anatomy Project (GUDMAP) creates a molecular atlas of the developing mammalian urogenital tract. This resource aids research into kidney and urogenital tract development and function.

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Published on: June 22, 2013

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Formation of Human Prostate Epithelium Using Tissue Recombination of Rodent Urogenital Sinus Mesenchyme and Human Stem Cells

Formation of Human Prostate Epithelium Using Tissue Recombination of Rodent Urogenital Sinus Mesenchyme and Human Stem Cells

Published on: June 22, 2013

Area of Science:

Developmental Biology
Genitourinary System Research
Molecular Anatomy

Background:

The developing mammalian urogenital tract (UGT) is crucial for human health and reproduction.
A systematic molecular and cellular understanding of UGT development is a high priority for research.
Existing knowledge gaps necessitate a comprehensive developmental anatomy initiative.

Purpose of the Study:

To establish a high-quality molecular anatomy of the developing mammalian urogenital tract.
To create resources supporting research on kidney and UGT development.
To provide a 21st-century molecular and cellular framework for UGT anatomy.

Main Methods:

Developing a cell-type ontology with molecular hallmarks using in situ hybridization, transcriptional profiling, and immunostaining.
Generating novel mouse strains with cell-type specific markers and genetic manipulation capabilities.
Annotating, collating, and releasing developmental data through a publicly accessible database and web portal.

Main Results:

The Genitourinary Developmental Molecular Anatomy Project (GUDMAP) has established a comprehensive molecular atlas of the developing UGT.
Resources include cell type ontologies, molecular hallmarks, and novel genetically modified mouse models.
A publicly accessible database facilitates rapid data dissemination and research utilization.

Conclusions:

GUDMAP provides essential resources for advancing basic and clinical research on the mammalian urogenital tract.
The project enhances understanding of UGT development, offering a foundation for future studies.
The initiative supports a new era of research grounded in detailed molecular and cellular anatomy.