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The fossa of vestibule of vagina (or fossa navicularis) is a boat-shaped depression between the vaginal opening/hymen and the frenulum labiorum pudendi within the vestibule. The small openings of the Bartholin's ducts can be seen in the grooves between the hymen and the labia minora , on either side.
The female fossa exhibits transient masculinization, starting at about 1–2 years of age, developing an enlarged, spiny clitoris that resembles a male's penis. The enlarged clitoris is supported by an os clitoridis, [15] [19] which decreases in size as the animal grows. [17]
Structures opening in the vulval vestibule are the urethra (urinary meatus), vagina, Bartholin's glands, and Skene's glands. [1]The external urethral orifice is placed about 25–30 millimetres (1–1.2 in) [2] behind the clitoris and immediately in front of that of the vagina; it usually assumes the form of a short, sagittal cleft with slightly raised margins.
The juvenile female fossa's os clitoridis and pseudo-penis shrink as she grows, unlike that of other pseudo-penis species. [3] The mammalian pseudo-penis appears to be simply for display, though the spotted hyena is an exception: the female spotted hyena urinates, copulates, and gives birth through her pseudo-penis.
Female genital organs with Bartholin's gland opening circled. Details; Precursor: ... Their duct length is 1.5 to 2.0 cm and they open into navicular fossa. [2]
LITTLE ROCK, Ark. – The Little Rock Zoo has welcomed a new furry friend- Riana the fossa. Riana is 16 years old, and zoo officials said that she is the second fossa to join the zoo’s community.
Fossa navicularis is an alternate name for two different boat-shaped depressions: fossa of vestibule of vagina; navicular fossa of male urethra
The ovarian fossa is a shallow depression on the lateral wall of the pelvis, where in the ovary lies. This ovarian fossa has the following boundaries: anteriorly : by the external iliac artery and vein; inferiorly : by the broad ligament of the uterus; posteriorly: by the ureter, internal iliac artery and vein