|
Ovotestis
An ovotestis is a gonad with both Testicle, testicular and Ovary, ovarian aspects. In humans, ovotestes are an infrequent anatomical variation associated with gonadal dysgenesis. The only mammals where ovotestes are not characteristic of an infrequent variation are mole (animal), moles, wherein females possess ovotestes along with a masculinized clitoris. These ovotestes in nonpregnant female moles secrete eight times as much testosterone as the ovotestes of pregnant moles. In invertebrates that are normally hermaphroditic, such as most gastropods (snails and slugs) in the clade Eupulmonata, an ovotestis is a common feature of the reproductive anatomy. In mice, ovotestes are structured such that the central region is testicular tissue while the poles both contain ovarian tissue. Experiments involving the SOX9 gene, which is initiated by the Testis-determining factor, SRY region of the Y chromosome, have shown the gene's requirement for testicular differentiation from the presence of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproductive System Of Gastropods
The reproductive system of gastropods (slugs and snails) varies greatly from one group to another within this very large and diverse taxonomic class of animals. Their reproduction, reproductive strategies also vary greatly. In many marine (ocean), marine gastropods, there are separate sexes (male and female); most Terrestrial animal, terrestrial gastropods however are hermaphrodites. Courtship display, Courtship is a part of the behaviour of mating of gastropods, mating gastropods. In some families of pulmonate land snails, one unusual feature of the reproductive system and reproductive behavior is the creation and utilization of love darts, the throwing of which has been identified as a form of sexual selection. Gastropods reproductive systems vary significantly from one taxonomic group to another. They can be separated into three categories: Marine (ocean), marine, Fresh water, freshwater, and land. Reproducing in marine or freshwater environments makes getting sperm to Egg ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovotesticular Syndrome
Ovotesticular syndrome (also known as ovotesticular disorder or OT-DSD) is a rare congenital condition where an individual is born with both ovarian and testicular tissue. It is one of the rarest disorders of sex development (DSDs), with only 500 reported cases. Commonly, one or both gonads is an ovotestis containing both types of tissue. Although it is similar in some ways to mixed gonadal dysgenesis, the conditions can be distinguished histologically. Terminology In the past, ovotesticular syndrome was referred to as true hermaphroditism, which is considered outdated as of 2006. The term "true hermaphroditism" was considered very misleading by many medical organizations and by many advocacy groups, as hermaphroditism refers to a species that produces both sperm and ova, something that is impossible in humans. Symptoms Physical * Enlargement of one or both breasts in men (gynecomastia) (present in 75% of cases) * Small phallus midway in size between a clitoris and a pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonadal Dysgenesis
Gonadal dysgenesis is classified as any congenital developmental disorder of the reproductive system characterized by a progressive loss of primordial germ cells on the developing gonads of an embryo. One type of gonadal dysgenesis is the development of functionless, fibrous tissue, termed streak gonads, instead of reproductive tissue. Streak gonads are a form of aplasia, resulting in hormonal failure that manifests as sexual infantism and infertility, with no initiation of puberty and secondary sex characteristics. Gonadal development is a process, which is primarily controlled genetically by the chromosomal sex ( XX or XY), which directs the formation of the gonad (ovary or testicle). Differentiation of the gonads requires a tightly regulated cascade of genetic, molecular and morphogenic events. At the formation of the developed gonad, steroid production influences local and distant receptors for continued morphological and biochemical changes. This results in the phenotyp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonad
A gonad, sex gland, or reproductive gland is a Heterocrine gland, mixed gland and sex organ that produces the gametes and sex hormones of an organism. Female reproductive cells are egg cells, and male reproductive cells are sperm. The male gonad, the testicle, produces sperm in the form of Spermatozoon, spermatozoa. The female gonad, the ovary, produces egg cells. Both of these gametes are haploid cells. Some hermaphroditic animals (and some humanssee Ovotesticular syndrome) have a type of gonad called an ovotestis. Evolution It is hard to find a common origin for gonads, but gonads most likely evolved independently several times. Regulation The gonads are controlled by luteinizing hormone (LH) and follicle-stimulating hormone (FSH), produced and secreted by gonadotropic cell, gonadotropes or gonadotrophins in the anterior pituitary gland. This secretion is regulated by gonadotropin-releasing hormone (GnRH) produced in the hypothalamus. Development The gonads develop f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biomphalaria Glabrata Ovotestis
''Biomphalaria'' is a genus of air-breathing freshwater snails, aquatic pulmonates belonging to the family Planorbidae, the ram's horn snails and their allies. ''Biomphalaria'' is the type genus of the tribe Biomphalariini. Both ''Planorbis'' and ''Taphius'' are synonyms for ''Biomphalaria''. The shell of this species, like all planorbids is left coiling (sinistral), but is carried upside down and thus appears to be right coiling (dextral). Species There are a suspected 35 extant species in the genus ''Biomphalaria'' in total (21 American species and 14 Old World species). However, there are a large number of invalid taxa within the ''Biomphalaria'' literature, which is likely the result of several (if not all) species of ''Biomphalaria'' being subject to various sources of intraspecific variation such as ecophenotypic variation and indeterminate shell growth. This intraspecific variation can make two individuals of the same species appear as two taxonomically distinct ent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleksa Vulović
Aleksa Vulović (born 29 October 1992) is a Serbian-Australian YouTube personality and online entertainer. Since beginning his public career, his videos have often gained widespread attention in Australian media. This includes his participation in the 2020 "Australian" Utah monolith, his journey to North Korea to get a haircut, and entering a casino after appearing dressed in a hospital gown and IV drip during the COVID-19 pandemic. Much of his work is made in collaboration with The Chaser. He has also worked with Aunty Donna. Vulović is also the co-star of Boy Boy, alongside fellow comedian Alex Apollonov of the I Did a Thing YouTube channel. Apollonov and Vulović regularly cooperate on their respective projects and appear in each other's videos. Together with Apollonov, they have roughly 7 million subscribers and their videos have been viewed more than 761 million times. Early life Vulović is originally from Belgrade. He was born intersex and received gender affirming sur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anton Krzyzanowski
Anton Krzyzanowski or Anton Kryzhanovsky (, born 3 March 1995) is a Russian intersex activist and sound designer. He is the founder of the intersex human rights initiative group Interseks.ru () and is known for speaking openly about living with ovotestis. Early life Krzyzanowski was born in a small town in Ural, Russia. He was assigned female at birth based on the appearance of his genitals but, when he was 13 years old, he went through puberty according to the male pattern. He showed male secondary sex characteristics: his voice broke, he developed facial hair, and did not start menstruating. Because of his religious family, in 2010 Krzyzanowski was sent to a monastery as family members believed that "demons were sitting in him." Krzyzanowski has stated that he was advised to pray in order to be "cured" and become a "normal" woman. When he was 15 years old, he was sent to the hospital due to intense stomach pains; the priests suspected that it was the result of not menstrua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheryl Chase (activist)
Bo Laurent, better known by her pseudonym Cheryl Chase (born August 14, 1956), is an American intersex activist and the founder of the Intersex Society of North America. She began using the names Bo Laurent and Cheryl Chase simultaneously in the 1990s and changed her name legally from Bonnie Sullivan to Bo Laurent in 1995. Early life Chase was born in New Jersey with ambiguous genitalia that baffled doctors. According to ''The New York Times'', her parents originally named her Brian Sullivan, noting that "Chase is XX, and the reason for her intersex condition has never been fully understood."Weil, Elizabeth (September, 2006)What if It's (Sort of) a Boy and (Sort of) a Girl?''The New York Times Magazine'' Other sources state her original name was Charlie,Lehrman, Sally (April 5, 1999)Sex police. Salon.comPhillips, Jen (May 2003). Born Between Two Sexes. '' Girlfriends'' since until recently Chase preferred to use pseudonyms when referring to her early life. Chase told ''Salon'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornu Aspersum
''Cornu aspersum'' (syn. ''Helix aspersa'', ''Cryptomphalus aspersus''), known by the common name garden snail, is a species of land snail in the family Helicidae, which includes some of the most familiar land snails. Of all terrestrial molluscs, this species may well be the most widely known. It was classified under the name ''Helix aspersa'' for over two centuries, but the prevailing classification now places it in the genus ''Cornu''. The Garden Snail is relished as a food item in some areas, but it is also widely regarded as a pest in gardens and in agriculture, especially in regions where it has been introduced accidentally, and where snails are not usually considered to be a menu item. Description The adult bears a hard, thin calcium carbonate, calcareous shell in diameter and high, with four or five Whorl (mollusc), whorls. The shell is variable in coloring and shade of color, but generally it has a reticulated pattern of dark brown, brownish-golden, or chestnut with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malacological Newsletter
Malacology, from Ancient Greek μαλακός (''malakós''), meaning "soft", and λόγος (''lógos''), meaning "study", is the branch of invertebrate zoology that deals with the study of the Mollusca (molluscs or mollusks), the second-largest phylum of animals in terms of described species after the arthropods. Mollusks include snails and slugs, clams, and cephalopods, along with numerous other kinds, many of which have shells. Fields within malacological research include taxonomy, ecology and evolution. Several subdivisions of malacology exist, including conchology, devoted to the study of mollusk shells, and teuthology, the study of cephalopods such as octopus, squid, and cuttlefish. Applied malacology studies medical, veterinary, and agricultural applications, for example the study of mollusks as vectors of schistosomiasis and other diseases. Archaeology employs malacology to understand the evolution of the climate, the biota of the area, and the usage of the site. Zoolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Testis-determining Factor
Sex-determining region Y protein (SRY), or testis-determining factor (TDF), is a DNA-binding protein (also known as gene-regulatory protein/transcription factor) encoded by the ''SRY'' gene that is responsible for the initiation of male sex determination in therian mammals ( placentals and marsupials). ''SRY'' is an intronless sex-determining gene on the Y chromosome. Mutations in this gene lead to a range of disorders of sex development with varying effects on an individual's phenotype and genotype. SRY is a member of the SOX (SRY-like box) gene family of DNA-binding proteins. When complexed with the steroidogenic factor 1 (SF-1) protein, SRY acts as a transcription factor that causes upregulation of other transcription factors, most importantly SOX9. Its expression causes the development of primary sex cords, which later develop into seminiferous tubules. These cords form in the central part of the yet-undifferentiated gonad, turning it into a testis. The now-induced Le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Testicle
A testicle or testis ( testes) is the gonad in all male bilaterians, including humans, and is Homology (biology), homologous to the ovary in females. Its primary functions are the production of sperm and the secretion of Androgen, androgens, primarily testosterone. The release of testosterone is regulated by luteinizing hormone (LH) from the anterior pituitary gland. Sperm production is controlled by follicle-stimulating hormone (FSH) from the anterior pituitary gland and by testosterone produced within the gonads. Structure Appearance Males have two testicles of similar size contained within the scrotum, which is an extension of the abdominal wall. Scrotal asymmetry, in which one testicle extends farther down into the scrotum than the other, is common. This is because of the differences in the vasculature's anatomy. For 85% of men, the right testis hangs lower than the left one. Measurement and volume The volume of the testicle can be estimated by palpating it and compari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
