Anus, Other Subject

Assignment Help:

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.


Related Discussions:- Anus

Civil War, Was the kansas-nebraska act a cause of the civil war?

Was the kansas-nebraska act a cause of the civil war?

Fisheries & wildlife division fwd, Fisheries & Wildlife Division (FWD): Th...

Fisheries & Wildlife Division (FWD): The Fisheries and Wildlife Division (FWD) develops supports and implements programs for urban fish and wildlife conservation, protection, recr

Explain what is meant by group cohesiveness, Question: (a) You want to...

Question: (a) You want to begin a therapy group. So far you have three people committed to join your group. Is it okay to start with only three? (b) You are about to get m

Explain what is meant by under-insurance, Question: a) Explain what is...

Question: a) Explain what is meant by under-insurance and why clients engage in same? b) Penny Sue insures her car for Rs 500,000 for a one-year period. The market value o

Explain with examples the implications of queues, QUESTION 1 (a) Discus...

QUESTION 1 (a) Discuss the four distinctive characteristics of services, and illustrate them with reference to a service product such as a restaurant (b) Outline the ‘gaps'

Explain the concepts of the expectancy theory, QUESTION 1 Compare writt...

QUESTION 1 Compare written and telephonic communication in terms of their media richness QUESTION 2 Identify the communication directions relevant to the following chan

HVAC Testing, how do I download flash cards for this course

how do I download flash cards for this course

Divisions of human skeleton:, Question: What is the Human skeleton? Describ...

Question: What is the Human skeleton? Describe their parts please Human skeleton can be divided into two divisions. Axial Skeleton? Skull? Vertebral Column? Rib Cage

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd