Anus, Other Subject

The anus is the last part of the digestive tract. It is a 2-inch long canal consisting of the pelvic floor muscles and the two anal sphincters (internal and external). The lining of the upper anus is specialized to detect rectal contents. It lets you know whether the contents are liquid, gas, or solid. The anus is surrounded by sphincter muscles that are important in allowing control of stool. The pelvic floor muscle creates an angle between the rectum and the anus that stops stool from coming out when it is not supposed to. The internal sphincter is always tight, except when stool enters the rectum. It keeps us continent when we are asleep or otherwise unaware of the presence of stool. When we get an urge to go to the bathroom, we rely on our external sphincter to hold the stool until reaching a toilet, where it then relaxes to release the contents.

Most of the digestive tract is a tube composed of four layers:

The serosa, or outermost layer.

The muscularis externa, whose two sets of muscles produce the waves of contraction, called peristalsis, that move food along.
The submucosa, which contains blood vessels and nerve tissue that control digestion. The mucosa-epithelial layer, which absorbs digested food.

Posted Date: 3/19/2013 6:18:28 AM | Location : United States







Related Discussions:- Anus, Assignment Help, Ask Question on Anus, Get Answer, Expert's Help, Anus Discussions

Write discussion on Anus
Your posts are moderated
Related Questions
Client: George, 28 year old male, 2 year technical college degree in air refrigeration and conditioning; twice divorced; no children; three different jobs in 8 years. Problem: I

1) Discuss the implications of stress on the CV system and cancer development. 2) Explain the paradoxical role of the immune system, including the inflammatory response, in tumo

Wellness and Lifestyle Analysis: Wellness is a state of optimal well-being that is oriented toward maximizing an individual's potential. This is a life-long process of moving towa

Someone who visits the ATM once every 8 days, and who spends $25 per day. What is his average cash balance?

Adhocracy-A form of business management which emphasizes individual initiative and self-organization in order to accomplish tasks. This is in contrast to bureaucracy which relies o

Question: The mass media are a big source of information and ideas. These can shape people's attitudes and to some degree direct their behaviour. Many researchers have seen t


Biological anthropology: Biological (or physical) anthropology looks at Homo sapiens as a genus and species, tracing their biological origins, evolutionary development, and geneti

Dear sir, I would like to stabilize a power supply 300Vdc/2A out voltage high current. Please help me !!! I’m waiting for your answer, thanks for listen my request. Thank you

Do you think that companies like Napster and others should be allowed to continue providing access to movies and music without penalties? No royalties are currently paid to the ar