Opinions on Anus

Here you have a list of opinions about Anus and you can also give us your opinion about it.
You will see other people's opinions about Anus and you will find out what the others say about it.
Also, you will see opinions about other terms. Do not forget to leave your opinion about this topic and others related.



This article is about the bodily orifice. For other uses, see Anus (disambiguation).
For details specific to the human anus, see Human anus.

The anus (from Latin anus, meaning "ring, anus", which is from the Proto-Indo-European ano–, meaning "ring" ) is an opening at the opposite end of an animal's digestive tract from the mouth. Its function is to control the expulsion of feces, unwanted semi-solid matter produced during digestion, which, depending on the type of animal, may include: matter which the animal cannot digest, such as bones; food material after all the nutrients have been extracted, for example cellulose or lignin; ingested matter which would be toxic if it remained in the digestive tract; and dead or excess gut bacteria and other endosymbionts.

Amphibians, reptiles, and birds use the same orifice (known as the cloaca) for excreting liquid and solid wastes, for copulation and egg-laying. Monotreme mammals also have a cloaca, which is thought to be a feature inherited from the earliest amniotes via the therapsids. Marsupials have a single orifice for excreting both solids and liquids and, in females, a separate vagina for reproduction. Female placental mammals have completely separate orifices for defecation, urination, and reproduction; males have one opening for defecation and another for both urination and reproduction, although the channels flowing to that orifice are almost completely separate.

The development of the anus was an important stage in the evolution of multicellular animals. It appears to have happened at least twice, following different paths in protostomes and deuterostomes. This accompanied or facilitated other important evolutionary developments: the bilaterian body plan, the coelom, and metamerism, in which the body was built of repeated "modules" which could later specialize, such as the heads of most arthropods, which are composed of fused, specialized segments.


In the image below, you can see a graph with the evolution of the times that people look for Anus. And below it, you can see how many pieces of news have been created about Anus in the last years.
Thanks to this graph, we can see the interest Anus has and the evolution of its popularity.

What do you think of Anus?

You can leave your opinion about Anus here as well as read the comments and opinions from other people about the topic.
It's important that all of us leave our opinions about Anus to have a better knowledge about it: