Urinary Meatus

Urinary Meatus

The urinary ( /ˈjʊərɨnˌɛriˌˈjʊərɨnri/) meatus ( /miːˈeɪtəs/) is an orifice or meatus of the urethra. It is the point at which urine and, in males, semen exits the urethra. The meatus features varying degrees of sensitivity to the touch among male mammals and female mammals.

In most males the meatus meets at the junction of the glans and the frenular delta, and continues in a longitudal pattern along the ventral aspect of the glans, which facilitates flow of urine during normal urination (micturition).

In females the meatus is located between the clitoris and the vagina in the vulvular vestibule of the female genitalia.

More specifically, it can refer to:

Anatomy: urinary system (TA A08, TH H3.06, GA 11.1215)
Abdomen
Kidneys
Layers
  • Renal fascia
  • Renal capsule
  • Renal cortex
    • Renal column
  • Renal medulla
    • Renal sinus
    • Renal pyramids
    • medullary interstitium
  • Renal lobe
  • Cortical lobule
  • Medullary ray
  • Nephron
Intrarenal arteries
  • Renal artery
  • Segmental arteries
  • Interlobar arteries
  • Arcuate arteries
  • Interlobular arteries
  • Afferent arterioles
Renal tubule
  • Renal corpuscle
    • Glomerulus
    • Bowman's capsule
  • Proximal tubule
  • Loop of Henle
    • Descending
    • Thin ascending
    • Thick ascending
  • Distal convoluted tubule
  • Connecting tubule
  • Collecting ducts aka Duct of Belini
  • Renal papilla
  • Minor calyx
  • Major calyx
  • Renal pelvis
Intrarenal veins
  • Efferent arterioles
  • Peritubular capillaries/Vasa recta
  • Arcuate vein
  • Interlobar veins
  • Renal vein
JGA
  • Macula densa
  • Juxtaglomerular cells
  • Mesangium/Extraglomerular mesangial cell
Filtration
  • Glomerular basement membrane
  • Podocyte
  • Filtration slits
  • Mesangium/Intraglomerular mesangial cell
  • Tubular fluid
Ureters
  • Orifice of ureter
  • Adventitia
  • Muscular layer
  • Mucosa
  • Ureteropelvic junction
Pelvis
Bladder
  • Apex
  • Uvula
  • Neck
  • Median umbilical ligament
  • Muscular layer
    • Trigone
    • Detrusor
  • Mucosa
  • Submucosa
Urethra
  • Urethral sphincters
    • External sphincter muscle of male urethra
    • External sphincter muscle of female urethra
    • Internal sphincter muscle of urethra

M: URI

anat/phys/devp/cell

noco/acba/cong/tumr, sysi/epon, urte

proc/itvp, drug (G4B), blte, urte

Male reproductive system (TA A09.3–4, TH H3.07.02, GA 11.1236)
Internal
Seminal
tract
Testes
  • layers
    • Tunica vaginalis
    • Tunica albuginea
    • Tunica vasculosa testis
  • Appendix
  • Mediastinum
  • Lobules
  • Septa
  • Leydig cell
  • Sertoli cell
  • Blood-testis barrier
Spermatogenesis
  • Spermatogonium
  • Spermatocytogenesis
  • Spermatocyte
  • Spermatidogenesis
  • Spermatid
  • Spermiogenesis
  • Spermatozoon
Other
  • Seminiferous tubules
    • Tubuli seminiferi recti
    • Rete testis
    • Efferent ducts
  • Epididymis
    • Appendix
    • Stereocilia
  • Paradidymis
  • Spermatic cord
  • Vas deferens
    • Ampulla
  • Ejaculatory duct
Accessory
glands
  • Seminal vesicles
    • Excretory duct of seminal gland
  • Prostate
    • Urethral crest/Seminal colliculus/Prostatic utricle/Ejaculatory duct
    • Prostatic sinus/Prostatic ducts
  • Bulbourethral glands
External
Penis
  • root
    • Crus
    • Bulb
    • Fundiform ligament
    • Suspensory ligament
  • body
    • Corpus cavernosum
    • Corpus spongiosum
  • glans
    • Foreskin
    • Frenulum
    • Corona
  • fascia
    • superficial/subcutaneous
    • deep/Buck's
  • Tunica albuginea
  • Septum of the penis
Urinary
tract
  • Internal urethral orifice
  • Urethra
    • Prostatic
    • Intermediate
    • Spongy
  • Navicular fossa
  • External urethral orifice
  • Lacunae of Morgagni
  • Urethral gland
Scrotum
  • layers
    • skin
    • Dartos
    • External spermatic fascia
    • Cremaster/Cremasteric fascia
    • Internal spermatic fascia
  • Perineal raphe

M: ♂ MRS

anat/phys/devp

noco/cong/tumr, sysi/epon

proc, drug (G3B/4BE/4C)

Read more about Urinary MeatusDisorders of The Urinary Meatus

Other articles related to "urinary meatus, meatus":

Disorders of The Urinary Meatus
... Disorders of the meatus include epispadias, hypospadias, and urethral blockage by virtue of foreign material, kidney or bladder stones (lithiasis), or deformity ...