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Related Concept Videos

Anatomy of the Genitourinary System II: Bladder and Urethra01:19

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...
Urethra01:16

Urethra

The urethra is a hollowed tubular organ through which urine is expelled from the body. This structure extends from the bladder to the external opening, allowing urine to be released.
The anatomy of the urethra differs between males and females. In females, the urethra is short, measuring about 3–4 cm in length, and opens anterior to the vaginal opening. In males, the urethra is longer and passes through the penis, serving dual purposes: expelling urine and ejaculating semen. The male urethra is...
Ureters01:22

Ureters

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...
Anatomy of the Genitourinary System I: Kidneys and Ureters01:11

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...
Urinary Bladder01:23

Urinary Bladder

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...
Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...

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Related Experiment Video

Updated: Jul 2, 2026

Urethral Stricture Induction Followed by Buccal Mucosa Graft Urethroplasty in a Rat Model
05:09

Urethral Stricture Induction Followed by Buccal Mucosa Graft Urethroplasty in a Rat Model

Published on: April 28, 2023

Two girls with urethral duplication.

Nicholas G Cost1, Steven M Lucas, Linda A Baker

  • 1Department of Urology, University of Texas Southwestern Medical Center, Children's Medical Center at Dallas, Dallas, Texas 75390-9110, USA. nicholas.cost@sbcglobal.net

Urology
|August 23, 2008
PubMed
Summary
This summary is machine-generated.

Urethral duplication in girls is rare but may be underdiagnosed. Diligent investigation is recommended for girls with incontinence or discharge, with surgical excision of the duplicated urethra being the suggested treatment.

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Area of Science:

  • Urology
  • Pediatric Surgery
  • Female Genitourinary Anomalies

Background:

  • Urethral duplication is an uncommon congenital anomaly.
  • This condition is rarely reported in female patients.
  • Associated anomalies are typically absent in cases of urethral duplication.

Observation:

  • Two cases of female urethral duplication were identified.
  • Neither patient presented with any associated congenital abnormalities.
  • Clinical treatment and current literature on female urethral duplication were reviewed.

Findings:

  • Surgical excision of the duplicated urethra is recommended.
  • Urethral duplication may be underdiagnosed in girls.
  • Thorough examination is crucial for diagnosis.

Implications:

  • Girls with complete incontinence, perineal discharge, or sinuses warrant diligent investigation for urethral duplication.
  • Early and accurate diagnosis can be achieved through careful physical examination.
  • Prompt surgical intervention can resolve symptoms associated with urethral duplication.