Spongy Urethra
Spongy Urethra - Related Videos
01:16
Urethra
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2024
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...
01:09
Spongy Bone
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2025
All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone). Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
01:19
Anatomy of the Genitourinary System II: Bladder and Urethra
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2025
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...
07:42
Nerve-sparing Mid-urethral Obstruction (NeMO) in Female Small Rodents
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Cited by 7 •
2017
Traditional modeling of partial bladder outlet obstruction in rodents is fraught with animal mortality. A denervation injury from dissection around the proximal urethra and bladder neck is also of major concern. We developed and evaluated a safe and reliable mid-urethral obstruction model, avoiding the shortcomings of the traditional model.
05:09
Urethral Stricture Induction Followed by Buccal Mucosa Graft Urethroplasty in a Rat Model
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Cited by 3 •
2023
In the present protocol, a urethral stricture induction was developed in Wistar rats, followed by urethral reconstruction with a buccal mucosa graft. A retrograde urethrogram and laser Doppler assessment were performed, validating urethral reconstruction (after stricture formation) and graft placement.
FAQs
The corpus spongiosum surrounds the urethral lumen with erectile tissue and helps prevent that passage from being compressed when the penis becomes erect. This support preserves a channel through which semen can move during ejaculation and helps maintain the urethra’s functional role during changing penile conditions.
Urine reaches the spongy urethra through bladder contractions, while semen is moved by coordinated contractions of the reproductive tract. The same passage therefore serves two transport functions controlled by different biological processes. Distinguishing these mechanisms helps explain why urethral anatomy matters to both urinary physiology and reproduction.
Because it is the longest urethral segment and extends through the penis, the spongy urethra forms a substantial part of the route to the external urethral meatus. Its length and surrounding corpus spongiosum make its anatomy important when considering how urinary flow and ejaculation travel through the penile portion of the urethra.
A urethral stricture can narrow the lumen of the spongy urethra, restricting the passage available for urine and potentially affecting semen movement as well. The resulting anatomical change is significant because bladder contractions and reproductive-tract contractions must propel their contents through that channel. Strictures therefore connect urethral structure directly with impaired transport.
Catheter placement requires attention to the urethra’s continuous route through the penis, including the long spongy segment and its external opening. The surrounding corpus spongiosum is part of the anatomical context that supports the lumen. Understanding this arrangement helps clinicians relate catheter passage to normal urethral structure and identify why altered anatomy may complicate access.
Hypospadias is relevant to the spongy urethra because the condition involves the anatomy of the urethral outlet and its route through the penis. Studying this segment helps connect the location of the external urethral meatus with the organization of the penile urethra. Its clinical importance illustrates how developmental anatomy can influence urinary function.