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- Bidder's_organ abstract "Bidder's organ is a spherical, brownish organ in any member of the family Bufonidae (true toads). The organ is located just in front of the kidney, or, mesonephros. It is formed at the cranial tip of the male and female gonad during the larval stage. Normally it is inactive and contains miniature follicles which have the capability to mature (becoming active). Zoologists have experimented with the physiology of the organ by castrating male toads (removing the testes). In doing so, the Bidder's organ enlarges and produces viable oocytes, that is, egg cells, and then it produces gonadotropins, which stimulate the growth of the Müllerian ducts to form uterus and oviducts. It therefore becomes a fully sexually functional female, which leads some zoologists to conclude that toads are actually paedomorphic.However, the Bidder's organ only develops into an ovary when testes are removed experimentally or not functioning properly (e.g. due to exposure to endocrine disrupting chemicals). Importantly, females can have Bidder's organs in addition to true ovaries which suggests that the Bidder's organ might not be a rudimentary ovary. The true function of the Bidder's organ remains a mystery.It is named in honour of Friedrich Bidder.".
- Bidder's_organ wikiPageExternalLink full.
- Bidder's_organ wikiPageID "1126579".
- Bidder's_organ wikiPageRevisionID "596396102".
- Bidder's_organ hasPhotoCollection Bidder's_organ.
- Bidder's_organ subject Category:Animal_reproductive_system.
- Bidder's_organ subject Category:Toads.
- Bidder's_organ type Amphibian101627424.
- Bidder's_organ type Animal100015388.
- Bidder's_organ type Chordate101466257.
- Bidder's_organ type Frog101639765.
- Bidder's_organ type LivingThing100004258.
- Bidder's_organ type Object100002684.
- Bidder's_organ type Organism100004475.
- Bidder's_organ type PhysicalEntity100001930.
- Bidder's_organ type Toads.
- Bidder's_organ type Vertebrate101471682.
- Bidder's_organ type Whole100003553.
- Bidder's_organ comment "Bidder's organ is a spherical, brownish organ in any member of the family Bufonidae (true toads). The organ is located just in front of the kidney, or, mesonephros. It is formed at the cranial tip of the male and female gonad during the larval stage. Normally it is inactive and contains miniature follicles which have the capability to mature (becoming active). Zoologists have experimented with the physiology of the organ by castrating male toads (removing the testes).".
- Bidder's_organ label "Bidder's organ".
- Bidder's_organ label "Narządy Biddera".
- Bidder's_organ label "Orgaan van Bidder".
- Bidder's_organ sameAs Orgaan_van_Bidder.
- Bidder's_organ sameAs Narządy_Biddera.
- Bidder's_organ sameAs m.048jdy.
- Bidder's_organ sameAs Q2594155.
- Bidder's_organ sameAs Q2594155.
- Bidder's_organ sameAs Bidder's_organ.
- Bidder's_organ wasDerivedFrom Bidder's_organ?oldid=596396102.
- Bidder's_organ isPrimaryTopicOf Bidder's_organ.