The first step of digestion begins at the mouth, where the food enters the mouth. Saliva is secreted from the salivary glands. The saliva contains enzymes such as Ptyalin, which starts sugar digestion. The enzymes also provide lubrication to help in the chewing and swallowing of the food. The food then goes down the esophagus and into the stomach, where the next step of digestion takes place.

In the stomach, a mixture of hydrochloric acid and Pepsin, which is secreted by the stomach wall, liquefies the food. At the same time, a substance called intrinsic factor binds Vitamin B in food and various gastric enzymes, such as Pepsin (which begins protein digestion), which are secreted by the stomach wall. Secretions of mucus protect the stomach from its digestive enzymes. The food is then mixed in the stomach, turning it into chyme(digested food). The muscular pumping mo

Appendicitis is an inflammation of the appendix. It is caused by bacteria from fecal matter that is trapped in the appendix. The appendix then becomes swollen and fills with pus. After this, the appendix can either break or the pus could be walled off and form an abscess. An attack of appendicitis usually begins with pain in the region of the naval, moving on to the lower right side of the abdomen. At first, the pain comes and goes, but then becomes continuous and soreness develops over the appendix region. The abdominal muscles tighten and the person becomes nauseated and usually has a fever. Laxatives and purgatives should not be used if some one has appendicitis. Any medications like this may cause the appendix to rupture, spreading bacteria throughout the abdomen. The patient should remain calm if they have appendicitis and call a doctor immediately. The usual treatment for appendicitis is to remove the appendix by surgery. This operation is called an appendectomy.

A peptic ulcer is an open sore in the mucus membrane of the stomach. While and ulcer is developing, part of the surface tissue breaks down, dies, and becomes inflames. There are two types of peptic ulcers. The first is the duodenal, which forms in the duodenum. Gastric ulcers develop in the stomach. The pepsin, located in the stomach, can eat through the lining of the stomach and the duodenum. Pepsin wouild not normally eat through the lining of the stomach and duodenum because of mucus which is normally secreted to protect the walls of them. Most peptic ulcers cause pain in the upper part of the abdomen. Peptic ulcers occur usually when the stomach is empty. People can reduce the risk of ulcers by not smoking and drinking alcoholic beverages.

Diarrhea is another disor

Some common words found in the essay are:
, America Europe, peptic ulcers, colon rectum, bowel movements, digestive system, lining stomach duodenum, radiation therapy chemotherapy, colon cancer common, secreted stomach wall, step digestion, stomach wall, digestion takes, eat lining stomach, secreted stomach, patients cancer, eat lining,
Approximate Word count = 1178
Approximate Pages = 5 (250 words per page double spaced)