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Vulva. In mammals, the vulva ( pl.: vulvas or vulvae) consists of the external female genitalia. The human vulva includes the mons pubis, labia majora, labia minora, clitoris, vulval vestibule, urinary meatus, vaginal opening, hymen, and Bartholin's and Skene's vestibular glands. The vulva includes the entrance to the vagina, which leads to the ...
In mammals and other animals, the vagina ( pl.: vaginas or vaginae) [1] is the elastic, muscular reproductive organ of the female genital tract. In humans, it extends from the vestibule to the cervix. The outer vaginal opening is normally partly covered by a thin layer of mucosal tissue called the hymen. At the deep end, the cervix (neck of the ...
In amniotes, the clitoris (/ˈklɪtərɪs/ ⓘ KLIT-ər-iss or /klɪˈtɔːrɪs/ ⓘ klih-TOR-iss; pl.: clitorises or clitorides) is a female sex organ.[1] In humans, it is the vulva's most erogenous area and generally the primary anatomical source of female sexual pleasure.[2] The clitoris is a complex structure, and its size and sensitivity ...
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The term hermaphrodite derives from the Latin: hermaphroditus, from Ancient Greek: ἑρμαφρόδιτος, romanized: hermaphroditos, which derives from Hermaphroditus (Ἑρμαφρόδιτος), the son of Hermes and Aphrodite in Greek mythology. According to Ovid, he fused with the nymph Salmacis resulting in one individual possessing physical traits of male and femal...
Sequential hermaphrodites
Sequential hermaphrodites (dichogamy) occur in species in which the individual first develops as one sex, but can later change into the opposite sex. (Definitions differ on whether sequential hermaphroditism encompasses serial hermaphroditism; for authors who exclude serial hermaphroditism, a sequential hermaphrodite is also stipulated to only change sex once.) This contrasts with simultaneous hermaphrodites, in which an individual possesses fully functional male and female genitalia. Sequent...
Simultaneous hermaphrodites
Simultaneous hermaphrodites (or homogamous hermaphrodites) are individuals in which both male and female sexual organs are present and functional at the same time. Self-fertilization often occurs.[citation needed] 1. Pulmonate land snails and land slugs are perhaps the best-known kinds of simultaneous hermaphrodites, and are the most widespread of terrestrial animals possessing this sexual polymorphism. Sexual material is exchanged between both animals via spermatophores, and is then stored i...
Pseudohermaphroditism
When spotted hyenas were first scientifically observed by explorers, they were thought to be hermaphrodites. Early observations of spotted hyenas in the wild led researchers to believe that all spotted hyenas, male and female, were born with what appeared to be a penis. The apparent penis in female spotted hyenas is in fact an enlarged clitoris, which contains an external birth canal. It can be difficult to determine the sex of wild spotted hyenas until sexual maturity, when they may become p...
The term hermaphrodite is used in botany to describe, for example, a perfect flower that has both staminate (male, pollen-producing) and carpellate(female, ovule-producing) parts. The overwhelming majority of flowering plant species are hermaphroditic.
Historically, the term hermaphrodite was used in law to refer to people whose sex was in doubt. The 12th-century Decretum Gratianistates that "Whether an hermaphrodite may witness a testament, depends on which sex prevails" ("Hermafroditus an ad testamentum adhiberi possit, qualitas sexus incalescentis ostendit."). Alexander ab Alexandro (1461–1523...
The evolution of anisogamy may have contributed to the evolution of simultaneous hermaphroditism and sequential hermaphroditism, but it remains unclear if the evolution of anisogamy first led to hermaphroditism or gonochorism.: 213 It is possible that hermaphroditism evolved from gonochorism, or vice versa. Most studies on its evolution focus on pl...
Below are two tables which report the average adult human height by country or geographical region. With regard to the first table, original studies and sources should be consulted for details on methodology and the exact populations measured, surveyed, or considered. With regard to the second table, these estimated figures for adult human ...
Biology is the scientific study of life.[1][2][3] It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field.[1][2][3] For instance, all organisms are made up of cells that process hereditary information encoded in genes, which can be transmitted to future generations. Another ...
Sex and the law. Female genital mutilation ( FGM) (also known as female genital cutting, female genital mutilation/cutting ( FGM/C) and female circumcision [a]) is the ritual cutting or removal of some or all of the vulva. The practice is found in some countries of Africa, Asia and the Middle East, and within their respective diasporas.
