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
Question 1 Write a short note on (i) Theatre of Cruelty; (ii) Poor theatre Question 2 Examine the Aristotelian conception of plot Question 3 Analyse the life history o

Question 1 Write a long note on feature writing and summarise techniques for writing a good feature Question 2 Write a note about building the magazine article Question 3 Writ

We at Expertsmind provide online teaching and Homework assistance to graduates and Post graduate students in US and UK. We offer help in almost all academic subjects including Engi

By the late 1990s Kiribati was in a waste crisis. The primary problem was on South Tarawa, the capital, and home of approximately one half of the country's people. There were no en

Question 1 What are the common traditional channels of communication? Describe the problems that can arise in such forms of communication Question 2 Explain the Unilinear Mod

What are the importance of dictionary catalog?.

Im gonna make an exam task, can you help me? how much does it cost?

Question 1: Although the Ministry of Education as a public institution has shown "remarkable resilience to a succession of policy changes" (The World Bank), yet policy formulat

Question 1 What are the objectives of EIA? Explain the benefits of EIA. What parameters must be considered in impact prediction and decision-making? Question 2 Discu

Costs Credit card issuers (banks) have more than a few types of costs: INTEREST EXPENSES Banks usually borrow the money they then provide to their customers. As they ac