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The human female reproductive system is made up of the internal and external sex organs that function in the reproduction of new offspring. The reproductive system is immature at birth and develops at puberty to be able to release matured ova from the ovaries , facilitate their fertilization , and create a protective environment for the ...
In females (specifically primates and rodents), separate orifices have evolved for all three, while males discharge urine and semen from the urethra through a common urinary meatus. [1] In marsupials [3] [4] and most placentals, the female urethra and vagina open into a urogenital sinus with a common urogenital opening (vulvar opening in ...
In female canids, the vagina contracts during copulation, forming a copulatory tie. [246] Female cetaceans have vaginal folds that are not found in other mammals. [247] [248] Monotremes, birds, reptiles and amphibians have a cloaca and is the single external opening for the gastrointestinal, urinary, and reproductive tracts.
The opening to the human vagina lies just below the urethral opening at the back of the vestibule. A 1996 study by Pendergrass et al. using vinyl polysiloxane castings taken from the vaginas of 39 Caucasian women, found the following ranges of dimensions: [3] lengths (measured using rods): 6.9 to 14.8 cm (2.7 to 5.8 in);
In placental mammals, females have two genital orifices, the vaginal and urethral openings, while males have one genital orifice in the penis where urine and semen exit the urethra during urination and ejaculation. [14] Male and female genitals have many nerve endings, resulting in pleasurable and highly sensitive touch. [15]
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 female reproductive system has two functions: The first is to produce egg cells, and the second is to protect and nourish the offspring until birth. The male reproductive system has one function, and it is to produce and deposit sperm. Humans have a high level of sexual differentiation.
Variations of the female reproductive tract can result from agenesis or hypoplasia, canalization defects, lateral fusion and failure of resorption, resulting in various complications. [18] Imperforate: hymenal opening nonexistent; will require minor surgery if it has not corrected itself by puberty to allow menstrual fluids to escape. [19]