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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.
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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.
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
Ejaculatory opens into this part of urethra?
prostatic 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.
Where does urine come out in a female?
The urethra; it is located between the clitoris and the vaginal introitus in the vulva.
What tube does sperm leave the body from?
urethra basically near the penis but its the urethra
What is the part in males that has prostatic and membranous and spongy parts?
Urethra has three regions in males, the prostatic urethra, membranous urethra, and the spongy urethra.
Urine and sperm leave the body through what structure?
the urethra which runs down the center of the erect penis. The urethra is also used for urination in both men and women.
