and Paylulog 338 Student Notebook for The Human Body: Concepts of Anatomy 2. Sub

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and Paylulog 338 Student Notebook for The Human Body: Concepts of Anatomy 2. Submucosa 3. Muscularis is different from other organs. The outer longitudinal layer of smooth muscle does not cover the entire organ. Instead, it is arranged in three bands. These bands, the taenia coll, extend the entire length of the colon and contract to gather the colon into pouches called haustra. What is the function of the haustra? Functions of the Large Intestine The large intestine has two major functions: mucosa absorbs 1. Water absorption. Indigestible food wastes travel through the large intestine as the water and electrolytes. As the chyme moves toward the rectum, feces are f What is found in feces? ormed. The bacterial population of the large intestine is called the intestinal fiora. What are the benefits of these bacteria? What gasses are produced by the intestinal flora? 2. Defecation. Defecation is the propulsion of feces through the large intestine and out the anus. Propulsion of food wastes through the large intestine is slower than it is through the small intestine. How long does it take material to pass through the colon? The peristaltic contractions of the large intestine only travel a short distance before stopping, then resuming elsewhere. What is the function of these gentle waves that occur only several times a day? Defecation reflex: This reflex begins when the rectum becomes full of feces and receptors in the wall are stimulated. Peristalsis intensifies and the internal sphincter relaxes. ·If the external (voluntary) sphincter relaxes, what happens? ·If the external sphincter is not relaxed, what happens?

Explanation / Answer

3) Taenia coli are running along t he colon and formed the haustra. Taenia coli are shorter and later on they form the pouches which are called as haustra. These are moved about each and every 25 minutes one to next. The filling of thse causes them to contact.

4) Faces contains bacteria and arelatively small amount of metabolic waste products. It also contains a dead epithelial cells from the lining of the gut.

5) Intestinal flora contains the E. coli and lactobacili type of freindly bacteria which help aginst the body infection.

for example lactobacilli produces lactic acid and prevent the candida albicans infection. Also produces vitamin K.

6) Intestinal flora produces carbon dioxide and methan by large intestinal bowel.

2) Defacation:

1. It generally takes 12 to 24 hours travel through the colon for the waste material.

2) Gentle waves helps to mix the food with gastric juice.

Defecation reflex:

If external voluntary sphincter will relaxes this allowing urine to flow out of the body and its not relax then urination not occures.Parasympathetic relaxation of the internal anal sphincter and voluntary relaxation of the external anal sphincter, and increasing the pressure within the sigmoid colon and rectum to propel the feces out through the anus.

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