Urethra

male urethraurethralfemale urethraurethral dischargeintraurethralurethra of male mammalurethral injuryurethral openingurogenital tractwoman's urethra
In anatomy, the urethra (from Greek οὐρήθρα – ourḗthrā) is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body.wikipedia
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Urinary bladder

bladderfundusintravesical
In anatomy, the urethra (from Greek οὐρήθρα – ourḗthrā) is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body.
Urine enters the bladder via the ureters and exits via the urethra.

Penis

peniledickcock
In males, the urethra travels through the penis and also carries semen.
In most species of animals in which there is an organ that might reasonably be described as a penis, it has no major function other than intromission, or at least conveying the sperm to the female, but in the placental mammals the penis bears the distal part of the urethra, which discharges both urine during urination and semen during copulation.

Urination

urinateurinatingmicturition
The external urethral sphincter is a striated muscle that allows voluntary control over urination.
Urination is the release of urine from the urinary bladder through the urethra to the outside of the body.

Semen

seminal fluidseminalsperm
In males, the urethra travels through the penis and also carries semen. The urethra provides an exit for urine as well as semen during ejaculation.
The bulbourethral glands secrete a clear secretion into the lumen of the urethra to lubricate it.

Ejaculation

ejaculateejaculatedejaculates
Females use their urethra only for urinating, but males use their urethra for both urination and ejaculation. The urethra provides an exit for urine as well as semen during ejaculation.
Retrograde ejaculation is the condition where semen travels backwards into the bladder rather than out the urethra.

Urine

urinaryhuman urinepiss
The urethra provides an exit for urine as well as semen during ejaculation.
Urination results in urine being excreted from the body through the urethra.

Internal urethral sphincter

internal sphincterinternal sphincter muscle of urethra
The internal sphincter, formed by the involuntary smooth muscles lining the bladder neck and urethra, is innervated by the sympathetic division of the autonomic nervous system.
It is the junction of the urethra with the urinary bladder surrounding the membranous urethra.

Urogenital sinus

sinovaginal bulbsurogenital sinuses
In human females (and in other primates), the urethra connects to the urinary meatus above the vagina, whereas in non-primates, the female's urethra empties into the urogenital sinus.
The upper part gives rise to the urinary bladder and the pelvic part gives rise to the prostatic and membranous parts of the urethra.

Urethral sphincters

urethral sphinctersphincter urethrae membranaceaeurinary sphincter
The external urethral sphincter is a striated muscle that allows voluntary control over urination.
The urethral sphincters are two muscles used to control the exit of urine in the urinary bladder through the urethra.

Prostatic urethra

pars prostaticaprostaticprostatic portion of the urethra
In the male the pelvic part of the sinus forms the prostatic urethra and epithelium as well as the membranous urethra and bulbo urethral glands.
The prostatic urethra, the widest and most dilatable part of the urethra canal, is about 3 cm long.

Seminal vesicle

seminal vesiclesvesicula seminalisvesicular gland
The excretory duct of each seminal gland unites with the corresponding vas deferens to form the two ejaculatory ducts, which immediately pass through the substance of the prostate gland before opening separately into the verumontanum of the prostatic urethra.

External sphincter muscle of male urethra

maleexternal urethral sphincterexternal sphincter muscle
The external sphincter muscle of urethra (or sphincter urethrae membranaceae) surrounds the whole length of the membranous portion of the urethra, and is enclosed in the fasciæ of the urogenital diaphragm.

Prostate

prostate glandprostaticventral prostate
The prostate surrounds the urethra just below the urinary bladder and can be felt during a rectal exam.

Spongy urethra

penile urethrabulbar urethrabulbous urethra
The spongy urethra (cavernous portion of urethra, penile urethra) is the longest part of the male urethra, and is contained in the corpus spongiosum of the penis.

Ejaculatory duct

ejaculatory ducts
They pass through the prostate, and open into the urethra at the seminal colliculus.

Pre-prostatic urethra

The pre-prostatic urethra is one of the four parts of the male urethra.

Clitoris

clitoralclitoral glansglans clitoridis
In the human female, the urethra is about 1.9 in to 2 in long and exits the body between the clitoris and the vagina, extending from the internal to the external urethral orifice.
In humans, the visible portion - the glans - is at the front junction of the labia minora (inner lips), above the opening of the urethra.

Membranous urethra

membranous portionmembranous portion of the urethra
In the male the pelvic part of the sinus forms the prostatic urethra and epithelium as well as the membranous urethra and bulbo urethral glands.
The membranous urethra or intermediate part of male urethra is the shortest, least dilatable, and, with the exception of the urinary meatus, the narrowest part of the urethra.

Urinary meatus

meatusurethral meatusurinary opening
In anatomy, the urethra (from Greek οὐρήθρα – ourḗthrā) is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body. In the human female, the urethra is about 1.9 in to 2 in long and exits the body between the clitoris and the vagina, extending from the internal to the external urethral orifice. Hypospadias and epispadias are forms of abnormal development of the urethra in the male, where the meatus is not located at the distal end of the penis (it occurs lower than normal with hypospadias, and higher with epispadias). In a severe chordee, the urethra can develop between the penis and the scrotum.
The urinary meatus, also known as the external urethral orifice, is the opening of the urethra.

Corpus spongiosum penis

corpus spongiosumcorpus cavernosum urethræcorpus cavernosum
The corpus spongiosum is the mass of spongy tissue surrounding the male urethra within the penis.

Urethral gland

urethral glands of LittréGland of Littreglands of Littre
The urethral or periurethral glands (also Littre glands after Alexis Littré) are glands that branch off the wall of the urethra of male mammals.

Hypospadias

hypospadiahypospadiccongenital penis abnormality
Hypospadias and epispadias are forms of abnormal development of the urethra in the male, where the meatus is not located at the distal end of the penis (it occurs lower than normal with hypospadias, and higher with epispadias). In a severe chordee, the urethra can develop between the penis and the scrotum.
Hypospadias is a congenital disorder of the urethra where the urinary opening is not at the usual location on the head of the penis.

Deep perineal pouch

Deep perineal spacedeep perineal sac
Membranous urethra in the male; proximal portion of urethra in the female

Internal urethral orifice

internalurethral meatusurethral orifice
In the human female, the urethra is about 1.9 in to 2 in long and exits the body between the clitoris and the vagina, extending from the internal to the external urethral orifice.
The internal urethral orifice is the opening of the urinary bladder into the urethra.

Urethritis

inflammation in the urethrainflammation of the penile urethrainflammation of the urethra
Infection of the urethra is urethritis, said to be more common in females than males. Urethritis is a common cause of dysuria (pain when urinating).
Urethritis is inflammation of the urethra.