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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

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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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The urinary system consists of two kidneys, two ureters, the urinary bladder, and the urethra.
The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...
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Urethra01:16

Urethra

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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...
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Urinary Bladder01:23

Urinary Bladder

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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

Physiology of Urine Formation

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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.
Glomerular Filtration
The first stage in urine formation is glomerular filtration. Each kidney contains approximately 1 million nephrons, the functional units of filtration, with a...
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Anatomy of the Genitourinary System I: Kidneys and Ureters01:11

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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...
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Related Experiment Video

Updated: Nov 15, 2025

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies
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The human urobiome.

L Brubaker1, C Putonti2,3, Q Dong4

  • 1Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Diego, La Jolla, CA, USA.

Mammalian Genome : Official Journal of the International Mammalian Genome Society
|March 2, 2021
PubMed
Summary
This summary is machine-generated.

The healthy bladder is not sterile; it harbors a unique microbiome (urobiome) that differs between sexes. This urobiome is linked to urinary tract disorders, suggesting new therapeutic avenues.

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Area of Science:

  • Microbiology
  • Urology
  • Genetics

Background:

  • The traditional view of a sterile urinary bladder is being challenged by recent research.
  • Metagenomic and metaculturomic studies reveal the presence of a resident microbial community, the urobiome, in both males and females.

Purpose of the Study:

  • To review the current understanding of the urobiome in health and disease.
  • To discuss the differences between female and male urobiomes.
  • To explore the association between the urobiome and lower urinary tract disorders.

Main Methods:

  • Review of existing literature utilizing metagenomic and metaculturomic approaches.
  • Analysis of studies investigating the urobiome's composition and its relationship with host factors.

Main Results:

  • The urobiome composition varies between sexes, influenced by anatomical and hormonal factors.
  • The urobiome is associated with lower urinary tract disorders, including overactive bladder and infections.
  • Limited research exists on the host genetics' influence on the urobiome.

Conclusions:

  • The urobiome plays a significant role in urinary tract health and disease.
  • Understanding the urobiome offers potential for novel therapeutic strategies targeting microbial communities.
  • Further research is needed to elucidate the interplay between host genetics and the urobiome.