Salamander in vagina-Urban Dictionary: Salamander

Patricia Brennan from Yale University is trying to encourage male Muscovy ducks to launch their ballistic penises into test tubes. Normally, the duck keeps its penis inside-out within a sac in its body. The whole process takes just a third of a second and Brennan captures it all on high-speed camera. Duck penises are a wonderful example of the strange things that happen when sexual conflict shapes the evolution of animal bodies. Many ducks form bonds between males and females that last for a whole mating season.

Salamander in vagina

It uses only half, that is, two heads at a time. Western Whiptail Aspidoscelis tigris. The Salamander in vagina are those mammals in which the breeding ends its development in a pouch, a kind of bag that own the females and where the breasts are. Coastal Giant Salamander Dicamptodon tenebrosus. Tailed frog Ascaphus Salamznder. Cogger, H. Larvae of amphibians are characterized by a great transformation known as metamorphosis.

White black skin color twins. ABOUT THE MAGAZINE

Salqmander you for your feedback. The male sends his pherome towards the female salamander by moving in front of her and waving his tail Winner, The sticky layer helps protect against bacterial infections and molds, reduces friction when swimming, and makes Salamander in vagina animal slippery and more difficult for predators to catch. In some ovoviviparous species the offspring are born metamorphosed, in others as larvae. After the first post on the genitals of birds and fish, we close chapter on the curiosities of the penises, vaginas and other reproductive organs of amphibians, reptiles and mammals. Curators' Corner. Long-tailed Salamander Eurycea longicauda longicauda Asian spas georgia Length: 4 - 6. Besides causing hallucinations, the neurotoxins present in the brew were said to cause extreme sexual arousal. Triggered by the changes in un, temperature, and water levels, anurans are ready to breed Salamander in vagina hibernation Mara, Cryptobranchoidea Giant salamanders. There is evidence that points towards a historical bottlenecking of Ambystoma that contributes to the variation issues. The water slowly passes through it, which allows to collect the oxygen and take it to the lungs.

It never grows up, retaining the red, feathery gills of its larval form even when it becomes sexually mature at sweet sixteen.

  • Cryptobranchoidea Salamandroidea.
  • Jefferson Salamander Ambystoma jeffersonianum Average Length: 4.
  • Salamander , order Caudata , any member of a group of about species of amphibians that have tails and that constitute the order Caudata.

It never grows up, retaining the red, feathery gills of its larval form even when it becomes sexually mature at sweet sixteen. It stays this way for the rest of its remarkably long life, and it can live past The olm was once described as a baby dragon on account of its small, snake-like body. It also has an array of supersenses, including heightened smell and hearing and possibly even the ability to sense electric and magnetic fields.

The caves of Slovenia and Croatia have provided the olm with safe haven for over 20 million years, but these unchanging habitats are changing quickly. Chemical pollutants leaching into the caves and the attentions of eager black market collectors have seriously hit the olm population, and it is now vulnerable to extinction. One such laboratory lies in Moulis, France. The animals are protected and regularly fed.

Sixty years on, there are more than individuals in the cave, making it the only successful olm breeding programme in the world. And ever since , researchers have been recording births and deaths among the olms on a weekly basis. Thanks to their painstaking census, we now have a unique glimpse into this odd creature and how it lives as long as it does. Yann Voituron from the University of Lyon has analysed the five decades of data and found that the oldest olms are around years old.

Still, they show no sign of age-related physical decline. This means that at the very least, the oldest olms should be able to hit a respectable age of around years and it may well live for even longer.

Among back-boned animals, the bigger you are, the longer you live generally speaking — there are exceptions. Whales, elephants and giant tortoises all top the longevity record books, but the humble olm can reach a century while weighing in at a puny 20 grams. The only other amphibian to even approach its lifespan is the giant salamander, which is a thousand times heavier.

You can see how unusual the olm is in the graph below in the gallery above, which plots the lifespan of living amphibians against their mass.

The olm is the black dot, looming over the clustered throng of white ones. The deeper mystery here is how the olm achieves such a long life. The standard explanation says that ageing is the result of the very chemical reactions that power our lives. These reactions furnish us with energy but produce highly reactive molecules called free radicals, which damage any DNA or protein that they touch. Over the years, this constant barrage takes a toll on our bodies and ageing is the result; longer lives can therefore be achieved by stopping the onslaught of free radicals, so the story goes.

There are two main ways of doing this, but neither applies to the olm. Reducing your metabolism could do the trick.

Since free radicals are the by-products of energy-producing chemical reactions, species that opt for life in the slow lane will produce less of them.

An alternative is to cope with the steady flow of free radicals with antioxidants that neutralise them. Voituron thinks that this tiny salamander will open some promising doors into the biology of ageing for years to come. Species that can escape from an early death often live longer than their peers, including birds and bats that can take to the air, and tree-dwelling mammals that can hide among the branches.

Sometimes this stage is completely bypassed, and the eggs of most lungless salamanders Plethodontidae develop directly into miniature versions of the adult without an intervening larval stage. Salamanders typically lay eggs in water and have aquatic larvae, but great variation occurs in their lifecycles. All amphibians possess cloaca, as well as reptiles, birds and some fish sharks and rays and mammals. Fertilization of the eggs occurs externally in all anuran species except for the tailed frog, probably because it lives and mates in cold, fast-running mountain streams, so that fertilization must occur quickly and efficiently Long, They most commonly occur in freshwater and damp woodlands, principally in temperate regions of the Northern Hemisphere.

Salamander in vagina

Salamander in vagina

Salamander in vagina. Salamanders of Virginia

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Animal genitalia: amphibians, reptiles and mammals | All you need is Biology

After the first post on the genitals of birds and fish, we close chapter on the curiosities of the penises, vaginas and other reproductive organs of amphibians, reptiles and mammals. As we saw in a previous post, the cloaca is the hole where the digestive, reproductive and excretory systems converge. All amphibians possess cloaca, as well as reptiles, birds and some fish sharks and rays and mammals.

Larvae of amphibians are characterized by a great transformation known as metamorphosis. Do not miss the successful post about amphibious sperm thieves. The anurans amphibians without tail, such as frogs have external reproduction and mating occurs usually in the water.

The male, who is smaller than the female, grips the female firmly. The contractions of the female when expelling the eggs stimulate the male to spray them of sperm in the same moment that they are expelled. The eggs are joined by a gelatinous mass that takes different forms depending on the species. The male frogs of the genus Ascaphus have a false tail that is nothing but an extension of the cloaca.

Almost all urodela amphibians with tail, such as salamanders and newts have internal fertilization. The male is placed in front of the female and releases sperm packages spermatophores containing the sperm. The female walks over one of them, collects it with the lips of the cloaca and places them in the spermatheca , a cavity where the sperm wait for the eggs to pass through the cloaca to make them fertilize.

The female lays the fertilized eggs one by one beating them in aquatic plants, except in some species of salamander, in which the female retains them and they are born live larvae ovovivivarism. Apoda or caecilians are amphibians without legs with internal fertilization, but unlike in anura, internal insemination occurs.

This is possible thanks to a pseudo-phallus phallodeum that have the males, which they insert in the cloaca of the female for two or three hours. In some ovoviviparous species the offspring are born metamorphosed, in others as larvae. During their stay inside the mother, they feed on oviduct cells, which they scrape with their special teeth. It is kept inside the tail and exits to the outside during intercourse thanks to the erectile tissues.

In spite of being double, during intercourse they only introduce one of the parts into the female, although they can do it alternately. In some sea turtles, the cloaca retains the ability to exchange gas, in other words, to breathe.

The water slowly passes through it, which allows to collect the oxygen and take it to the lungs. During the erection, it fills with fluid, deploys and exits, reaching a comparatively larger size. Crocodiles have a rigid penis always in erection hidden inside the body that, shot out like a spring to the outside at the time of copulation and is hidden again at the same speed.

According to this study , fibrous tissue and collagen makes unnecessary the erection and detumescence in the American alligator. Monotremes are the most primitive mammals, with some reptilian characteristics, like the laying of eggs and the presence of cloaca.

Platypus and echidnas are the best known representatives. Monotremes penises have 4 heads, although not all can work simultaneously. It uses only half, that is, two heads at a time. In the case of the platypus only the left side works, since the female only has functional the left ovary. The marsupials are those mammals in which the breeding ends its development in a pouch, a kind of bag that own the females and where the breasts are.

The best known marsupials are kangaroos, koalas, opossums and the extinct thylacine. Generally females have two vaginas, which fit with the bifurcated penises of males, which retract into the S-shaped body, In the case of kangaroos, females have three vaginas and two uteri.

The two lateral vaginas lead the sperm towards the uterus and the central one is where the brood descends during the delivery. In placental mammals, such as humans, the offspring develops in the uterus and is nourished by the placenta.

Many placental males have a penile bone baculum. This bone would allow copulation even if there is no erection. Some placentals have lost their baculum: humans, hyenas, equines horses, zebras, etc.

In them, erection is possible thanks to the blood filling of the corpora cavernosa. In the case of dolphins, their penis is prehensile and sensory. The end is rotatory and it is not uncommon to see them feel the seabed with their penis. This has led to false myths such as that the dolphins are always excited and try to copulate with anything that gets them ahead.

This tactile ability would also allow them to strengthen social bonds between them, even among males. This behavior is also observed in orcas. At first glance we could confuse a male hyena with a female.

Female spotted hyenas Crocuta crocuta have a long vagina that extends into an external clitoris of the same size as the male penis.

The offspring must cross this long channel at birth, who suffers from great tears in the first deliveries and sometimes the puppies die because they can not cross it.

In addition, the vaginal lips are also large and full of fat, which could seem testicles. Esteu comentant fent servir el compte WordPress. Esteu comentant fent servir el compte Google. Esteu comentant fent servir el compte Twitter.

Esteu comentant fent servir el compte Facebook. Aquest lloc utilitza Akismet per reduir els comentaris brossa. Apreneu com es processen les dades dels comentaris. ANURA The anurans amphibians without tail, such as frogs have external reproduction and mating occurs usually in the water. Amplexus of Litoria xanthomera.

Photo: Rainforest harley The contractions of the female when expelling the eggs stimulate the male to spray them of sperm in the same moment that they are expelled. Tailed frog Ascaphus truei. Salamander spermatophores Ambystoma sp. Photo: Placeuvm APODA Apoda or caecilians are amphibians without legs with internal fertilization, but unlike in anura, internal insemination occurs. Caecilia phallodeum. Viviparous lizard Zootoca vivipara showing its hemipenis.

Mediterranean tortoise penis Testudo hermanni. Photo: Ellen Rathbone Generally females have two vaginas, which fit with the bifurcated penises of males, which retract into the S-shaped body, In the case of kangaroos, females have three vaginas and two uteri. Reproductive system of marsupial femanel.

The arrow shows the uretral hollow. If so, why? Cogger, H. Encyclopedia of Reptiles and Amphibians. San Diego: Academic Press. Cover photo. Fill in your details below or click an icon to log in:. Nom necessari. Lloc web. Ho sentim, el bloc no pot compartir entrades per correu.

Salamander in vagina

Salamander in vagina

Salamander in vagina