What was that said the anus

Anus in posterior interradius, on oral surface, closed by valvular pyramid. The opening through which feces pass out of the body. New Word List Word List. Save This Word! Two others, a pair of sponge parasites called Syllis ramosa and Ramisyllis multicaudata, will twine their body through host tissues like a tapestry of tree roots, with each tip terminating in its own proprietary butthole; they have hundreds, perhaps thousands , in total. A better backstory for the orifice, he said, might involve a body plan stolen from the reproductive tract, which already naturally terminates at the animalian posterior.

A cursory glance at the animal tree of life might at first suggest that anal openings appeared about million years ago, around the time our own bloblike ancestors straightened out into tubes. But Hejnol and many others think that the anus was so useful that animals independently evolved it at least half a dozen times, perhaps many more, and not necessarily in the same way.

This timeline has other snags: Some creatures have since lost their anal opening—and some might have made theirs even further back in history. One of the largest potential wrinkles in the smooth anus narrative takes the shape of a comb jelly—a gelatinous animal that vaguely resembles a translucent Darth Vader helmet and is thought to be at least million years old. More than a century passed before their acts of defecation were finally caught on camera, by the biologist William Browne of the University of Miami and his colleagues, who filmed one of the amorphous creatures taking a big fishy dump in the lab.

If comb jellies were pooping, that poop had to be coming out of some sort of rear hole. Perhaps, some said, the history of the anus ran far deeper in time than many had thought. Some hailed the discovery as revolutionary. Such a scenario would leave the chronology of our own anus, which emerged out of a different line of creatures at a separate point in time, intact. Just as new apertures can rupture into being, useless ones can disappear, as seems to have been the case with brittle stars and mites , which stitched their ancestral anuses shut.

Some ambivalent creatures might even gouge out transient anuses—holes that come and go on an as-needed basis. Many of the animals that have managed to keep some version of the anus embellished upon it, and now harbor an organ of immense extravagance.

Turtles, like sea cucumbers, breathe through their butt. Their nose and throat swabs and serum samples were also collected for testing. Additional tests using anal swabs can avoid missing infections, as virus traces in faecal samples or anal swabs could remain detectable for a longer time than in samples taken from upper respiratory tract, Li Tongzeng, a respiratory and infectious disease doctor in Beijing city, told state TV last week.

Problems with the anus are common. They include hemorrhoids , abscesses , fissures cracks , and cancer. You may be embarrassed to talk about your anal troubles. But it is important to let your doctor know, especially if you have pain or bleeding. The more details you can give about your problem, the better your doctor will be able to help you.

Treatments vary depending on the particular problem.