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Related Concept Videos

Urinary Bladder01:23

Urinary Bladder

4.7K
The urinary bladder is a hollow, muscular sac that temporarily stores urine before it is expelled from the body. It can hold approximately 600 mL of urine prior to micturition. The bladder is retroperitoneal and located behind the pubic symphysis in the pelvic floor.
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
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Anatomy of the Genitourinary System II: Bladder and Urethra01:19

Anatomy of the Genitourinary System II: Bladder and Urethra

3.7K
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...
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Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

432
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
432
The Micturition Reflex01:26

The Micturition Reflex

4.1K
Urination, or micturition involves the coordination of the bladder's detrusor muscle and two sphincters to ensure controlled bladder emptying.
The process begins with bladder filling, where the bladder wall stretches as urine accumulates. This stretching activates the urine storage reflex, mediated by the sacral spinal segments and the pontine storage center. Efferent sympathetic impulses stimulate the detrusor muscle to relax and the internal urethral sphincter to contract, facilitating...
4.1K
Ureters01:22

Ureters

2.2K
The ureters are retroperitoneal tubes located on either side of the vertebral column. They are responsible for transporting urine from each kidney to the urinary bladder. These tubes have thick walls and are approximately 25-30 cm long. Their diameter is around 10 mm at the renal pelvis, gradually narrowing to 1 mm as the ureter obliquely enters the posterior bladder wall through the ureteric orifices. The shape of these orifices is slit-like, which helps to prevent urine backflow toward the...
2.2K
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

7.6K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Related Experiment Video

Updated: May 6, 2026

Magnetic Resonance Imaging Assessment of Carcinogen-induced Murine Bladder Tumors
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Magnetic Resonance Imaging Assessment of Carcinogen-induced Murine Bladder Tumors

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A magnetic mass within the bladder.

Fahad Alyami1, Jeffrey Himmelman, Thomas Whelan

  • 1Saint John Regional Hospital, Dalhousie University, Saint John, New Brunswick, Canada.

The Canadian Journal of Urology
|October 17, 2013
PubMed
Summary

Foreign bodies in the bladder are common, with treatment focused on minimally invasive removal. This case highlights the challenges of removing a large number of magnetic beads endoscopically.

Area of Science:

  • Urology
  • Medical Case Reports

Background:

  • Bladder foreign bodies present a clinical challenge with diverse reported objects.
  • Treatment aims for rapid, least invasive removal, ideally via endoscopy.

Observation:

  • A patient presented after self-insertion of 150 magnetic spherical beads into the bladder.
  • The large number and magnetic nature of the beads posed a unique removal challenge.

Findings:

  • Endoscopic removal was attempted but complicated by the quantity and magnetic properties of the beads.
  • The case underscores the limitations of endoscopic procedures for certain complex foreign bodies.

Implications:

  • Management strategies for unusual bladder foreign bodies require careful consideration of object characteristics.

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A Decentralized Ex Vivo Murine Bladder Model with the Detrusor Muscle Removed for Direct Access to the Suburothelium during Bladder Filling
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Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing
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A Decentralized Ex Vivo Murine Bladder Model with the Detrusor Muscle Removed for Direct Access to the Suburothelium during Bladder Filling
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  • This case may inform approaches to similar complex urological foreign body presentations.