If small, unfurried invertebrate genes pass by, our anus could reuse the sperm shoot.
New research suggests instead of releasing the first waste The anal orifice was Finish hatch For male sex cells given a new task.
Researchers at the University of Bergen in Norway xenacoelomorphsDistant relatives of flatworms that have culprits due to intestines. Despite the lack of dedicated poop, Xenacoelomorphs uses some of the same genes that they use to turn the digestive system into tubes, Gonadopore Instead.
“If the hole is there, you can use it for other things,” Zoologist Andreas Hejnol I said Michael Le Page New Scientist.
Animal anus exists in unexpected varieties, from pores that release countless waste on the backs of thin pests to jellyfish that don’t bother with dedicated channels for garbage.
The flat insect thysanozoon nigropillosum has multiple anus protruding from its back. (image: https://t.co/5gzsgbnowh https://t.co/duqj1o4znn)) pic.twitter.com/3hhzezbspn
– FutureProof (@newstalkscience) April 14, 2018
Like jellyfish, Xenacoelomorphs use their mouths to ingest food and expel waste. However, unlike jellyfish, men have another hole to release sperm. However, females at Xenacoelomorph use their mouths to release eggs, providing food intake and waste disposal.
Developmental biologist Carmen Andrikou and his team discovered that when Xenacoelomorph reverses the skin to develop gonadopore, they use the exact same genes that other animals use to create anal holes.
Many animals today, including birds and platymonds, have joint holes in both reproductive and digestive functions – cloaca.
“The presence of cloaca in animals and the fusion of gonads sighted in species of cloaca [flatworm]suggests that the relationship between the digestive and reproductive system is likely to evolve convergently or share a common ancestor,” Andriko and colleagues write In their paper, they are still waiting for peer reviews.
All this suggests that the anus evolved after male sperm shoots merged with the gastrointestinal tract and formed a second opening.
Other researchers disputed the series of events; Discussion The anal lack of that Xenacoelomorphs could mean that these thin-breed animals develop anal holes and then lose them, belonging to different positions in the animal’s family tree.
Regardless of how it happened, our people have a more efficient way for anal (sul gut) to process nutrients from our food.
Therefore, the development of the anal allowed animals to grow larger than the buttress, paving the way for our existence.
This research has been uploaded biorxiv I’m still waiting for publication.
