Apendix, Rectum, Anus

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Apendix, Rectum, Anus

  1. 1. group 7 initial D Group members: qihang zhou bo marcus bryan
  2. 2. The human digestive system
  3. 3. anus The anus is an opening where the waste products are passed out from the rectum. When a person wakes up, he/she would have an urge to pass faeces. . Others will tends to have that feeling when they have just finish eating the food, whether the food is part of breakfast, lunch or dinner. This means that another process of the digestion is happening again. The anus
  4. 4. Where the anus is located The human anus is situated between  the buttocks, posterior to the perineum. It has two anal sphincters, one internal, the other external.
  5. 5. External Sphincter of the Anus The job and function of the External  Sphincter of the Anus is that it keeps the exit close throughout the day. But, the External sphincter may not do its job properly. That is when you have a diarrhea, and have problems controlling the faeces
  6. 6. Internal Sphincter of the Anus The job of the Internal Sphincter of  the anus is to keep the waste products from our body from leaving the body before its time and escorting it out when the time is right. It is an involuntary muscle, which means it does its job on its own without any orders.
  7. 7. Illness you can get in or out of the anus Anal fissures: It is a problem when  unnatural cracks or tear in the skin of the anal canal. they may cause severe periodic pain after defecation Most anal fissures are caused by stretching of the anal mucosa beyond its capability.
  8. 8. Illness you can get in or out of the anus piles are swelling and inflammation  of veins in the rectum and anus. It is caused by increased straining during bowel movements caused by constipation or diarrhea, which may lead to hemorrhoids
  9. 9. rectum The function: to act as a temporary  storage facility of feces. However if defection is delayed for a prolonged period, constipation and hardened feces results. The process: As food moves through it,  the colon absorbs water while forming waste products, or stool. Muscle contractions in the colon push the stool toward the rectum. By the time stool reaches the rectum, it is solid because most of the water has been absorbed. So the rectum is the end of the digestive tract after the colon and before the anus.
  10. 10. Where is it located? The rectum is the final straight portion of the large intestine in some mammals. The first 6 feet of the large intestine are called the large bowel or colon. The last 6 inches are the rectum and the anal canal. rectum
  11. 11. Common diseases of the rectum There are also common diseases like • rectum bleeding. Rectum bleeding, refers to passages of bright red blood from the anus, often mixed with stool and / or blood cells. •Symptoms related to the rectum can occur from colon cancer, hemorrhoids, rectal prolapse, anal warts or polyps. Infectious processes can occur from ruptured of a polyp of infection within a colon cancer.
  12. 12. appendix • Location It is attached to the first part of our large intestine
  13. 13. Functions of appendix • The appendix has no known function in humans. Evidence suggests that our evolutionary ancestors used their appendixes to digest tough food like tree bark, but we don't use ours in digestion now. Some scientists believe that the appendix will disappear from the human body.
  14. 14. Functions of appendix • Althought the appendix have no known functions, the appendix is rich in infection- fighting lymphoid cells suggesting that it might play a role in our immune system. Whether the appendix has a function or not, it can be removed without any ill effects.
  15. 15. Diseases of appendix • Appendicitis- Indigestible food delivered from the small intestine to the large intestine flows into the appendix and is forced out by contraction of the muscular walls of the appendix. A blockage in the opening where the appendix attaches to the large intestine can lead to inflammation of the appendix, known as appendicitis. This can cause acute pain, fever, nausea, vomiting and loss of appetite, but can be cured easily by removing the appendix.
  16. 16. acknowledgements www.yahoo.com   www.wikipedia.org  http://www.myelectron icmd.com/m_bt.php
  17. 17. Thank you for your attention.

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