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Urination, or micturition involves the coordination of the bladder's detrusor muscle and two sphincters to ensure controlled bladder emptying.
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Anatomy of the Genitourinary System II: Bladder and Urethra01:19

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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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Disorders of the Urinary System01:20

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The urinary system is responsible for eliminating waste and excess fluids from the body. However, disorders of the urinary system can arise due to various reasons like infections, stress, age, congenital abnormalities, and lifestyle.
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Urinary Bladder01:23

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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.
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Physiology of Urine Formation01:24

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Urine formation is an essential function of the human body. It plays a critical role in maintaining homeostasis by regulating the volume and composition of body fluids. The kidneys, the primary organs involved in this process, filter blood to remove waste products and excess substances, ultimately producing urine.
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The genitourinary system is critical to maintaining fluid balance, waste elimination, and reproductive function. Nurses play a vital role in assessing this system, beginning with a thorough health history. This process involves gathering patient information, identifying risk factors, and recognizing symptoms of genitourinary disorders. Early detection is vital for timely interventions and management.1. Gathering Patient InformationA complete health history includes the patient’s personal,...
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Updated: Jul 16, 2025

Detrusor Underactivity Model in Rats by Conus Medullaris Transection
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Aging and urinary control: Alterations in the brain-bladder axis.

Cara C Hardy1, Ron Korstanje1

  • 1The Jackson Laboratory, Bar Harbor, Maine, USA.

Aging Cell
|September 23, 2023
PubMed
Summary
This summary is machine-generated.

Urinary tract aging causes decreased bladder control and tissue responsiveness in older adults. More research is needed on the brain-bladder axis to improve treatments for urinary dysfunction.

Keywords:
agingmolecular biology of agingneuroscience

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Area of Science:

  • Gerontology
  • Neuroscience
  • Urology

Background:

  • Millions of older adults experience age-associated bladder control issues, impacting quality of life and family burden.
  • Current therapeutic options for urinary dysfunction in older adults are limited and often ineffective.
  • There is a significant need to understand the aging process within the urinary tract.

Purpose of the Study:

  • To review current knowledge on age-related changes in the brain-bladder axis structure and function.
  • To identify critical knowledge gaps in the field of urinary tract aging.
  • To highlight areas for future research to improve understanding and treatment.

Main Methods:

  • Comprehensive literature review of studies on aging, bladder control, and the brain-bladder axis.
  • Synthesis of existing data on structural and functional changes associated with urinary aging.
  • Identification of key research questions and unmet needs in the field.

Main Results:

  • Urinary aging is characterized by reduced tissue responsiveness and impaired control of the voiding reflex.
  • Dysfunctional signaling along the brain-bladder axis and structural changes in the bladder wall are observed.
  • Existing research highlights significant gaps in understanding age-related neurological and urological alterations.

Conclusions:

  • Age-associated changes in the brain-bladder axis contribute to urinary dysfunction in older adults.
  • Further investigation into how aging affects brain-bladder communication is crucial.
  • Identifying genetic targets linked to functional outcomes is essential for developing effective therapies.