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The three regions/sections of the male urethra are:
- Prostatic Urethra
The prostatic urethra begins at the neck of the bladder and includes all of the section that passes through the prostrate gland. It is the widest and most dilatable part of the male urethral canal.
- Membranous Urethra
The membranous urethra is the shortest and narrowest part of the male urethra. This section measures approx. 0.5 - 0.75 inches (12 - 19 mm) in length and is the section of the urethra that passes through the male urogenital diaphragm.
The external urethral sphincter (muscle) is located in the urogenital diaphragm (as for the female urethra). This muscle is referred to as the "compressor urethrae muscle" in some older textbooks.
The passage of urine along the urethra through the urogenital diaphragm is controlled by the external urethral sphincter, which is a circular muscle under voluntary control (that is, it is innervated by the somatic nervous system, SNS).
See the page about micturation for more about control of these structures by the nervous system.
- Spongy Urethra
The spongy urethra is the longest of the three sections. It is approx. 6 inches (150 mm) in length and is contained in the corpus spongiosum that extends from the end of the membranous portion, passes through the penis, and terminates at theexternal orifice of the urethra - which is the point at which the urine leaves the body.
What else can I help you with?
What is the membranous urethra?
The membranous urethra is a segment of the male urethra that extends from the prostatic urethra to the bulbous urethra. It is approximately 1-2 centimeters long and passes through the urogenital diaphragm, which contains the external urethral sphincter. This section is relatively narrow and is more susceptible to injury compared to other parts of the urethra, making it clinically significant in trauma cases. In females, the urethra is shorter and does not have a distinct membranous section.
What is the glandular urethra?
The glandular urethra refers to a portion of the male urethra, specifically the segment located within the prostate gland. It is responsible for transporting urine and semen out of the body. This section contains mucous glands that secrete fluids, which help lubricate the urethra and facilitate the passage of urine and sperm. The glandular urethra plays a crucial role in both the urinary and reproductive systems.
What substances does the urethra carry?
In both genders, the urethra transports urine. In men, the urethra also transports semen which contains sperm cells and can impregnate a woman. In males, the urethra takes a detour through the prostate gland and seminal vesicles, so their urethrae are used for urination and ejaculation.
What does the penis of a male cat do?
It contains the urethra for urine to pass from the urinary bladder, and carries semen for reproduction.
Kidneys Which organ system contains your organ?
The kidney is part of the urinary system, which consists of the kidneys, ureters, urinary bladder, and urethra.
Where are the erectile locations in the relation to the urethra?
The erectile tissues associated with the penis, primarily the corpora cavernosa and the corpus spongiosum, are located surrounding the urethra. The corpora cavernosa are situated on either side of the urethra, while the corpus spongiosum, which contains the urethra, runs along the underside of the penis. This arrangement allows for the expansion and engorgement of these tissues during erection, facilitating sexual function.
What do you call the fluid that protects sperm from acidity in the urethra?
The fluid that protects sperm from acidity in the urethra is called seminal fluid or semen. It is primarily produced by the seminal vesicles and contains buffers that help neutralize the acidic environment of the urethra, making it more hospitable for sperm.
What part of the vagina does a woman urinate from?
the urethra
What portion of the urethra is between the prostate and penis?
The prostatic or membranous urethra
What is the purpose of dilating the urethra?
Dilating the urethra is done when there is a stricture (abnormal narrowing) of the urethra in order to make the urethra wider.
What brings urine and semen out of the body and through the penis?
The urethra.
Ejaculatory opens into this part of urethra?
The ejaculatory duct opens into the prostatic part of the urethra, specifically where the prostatic urethra meets with the membranous urethra. This junction is located within the prostate gland.
