Digestive system Reference Libraries

Page 2 of about 20 Articles
2013-03-04 15:05:59

The appendix is a dead-end tube like structure, ranging from 2 to 20 cm, that spans off the cecum of the colon. It is attached to the lower part of the large intestine. Formation and Orientation The appendix can be found in many mammals including marsupials, euarchontoglires (rodents) as wells as humans of course. It is also an organ that forms in the embryotic stage during pregnancy....

2013-03-04 14:34:35

The stomach is the hollow organ that helps along digestion after mastication (chewing). It is the next step after the esophagus and before the small intestines. Formation and Orientation The stomach is composed of four parts. The cardia is the first part of the stomach in the digestive tract. It is the part of the stomach that allows the food to empty from the esophagus. The most northern...

2013-03-04 10:30:47

Sigmoidoscopy is a medical procedure in which the physician is able to visualize the inside walls of the large intestine with a scope placed in the rectum. Only the distal part of the colon, or the sigmoid, is examined as opposed to the entire bowel in a colonoscopy. Reasons for procedure The use of this procedure is mainly for early detection of colorectal cancer, vascular abnormalities...

2013-01-18 11:28:50

The trachea, commonly called the windpipe, is the air passage-way from the mouth to the lungs. Non-fish vertebrae all have a trachea. The moist with mucus walls of the tube-like structure trap inhaled particles to keep them from entering the lungs. Structure The trachea is an open-ended cylindrical structure that starts at the larynx and ends at the bifurcation. It is about one inch in...

2013-01-18 11:24:15

The tonsil is an organ that functions within the lymphatic system. It is a mass of lymphoid tissue located in the throat as a first line defense against pathogens as they are inhaled or ingested. Types and Locations The most commonly spoken of tonsil is the palatine tonsil. These tonsils are located in the back of the throat on each side of the oropharynx. Adenoids are the second most...

2012-07-01 19:23:24

The Esophagus is an organ which consists of a muscular tube through which food passes from the pharynx to the stomach. During swallowing, food passes from the mouth through the pharynx into the esophagus and travels to the stomach via peristalsis -- a radially symmetrical contraction and relaxation of muscles that propagate in a wave downward. The word esophagus is derived from the Greek...

Gastric Chief Cell
2012-07-01 18:59:43

The Gastric Chief Cell (peptic cell or gastric zymogenic cell) is a cell found in the stomach that releases pepsinogen, gastric lipase and Chymosin (an enzyme that clots milk). Pepsinogen is only released when the cell is stimulated by a number of factors, including cholinergic activity and increased acidity in the stomach. The gastric chief cell works in conjunction with the parietal cell,...

Lactobacillus casei
2011-04-18 21:59:17

Lactobacillus casei is a species of genus Lactobacillus found in the human intestine and mouth. Since it produces lactic acid it helps with the propagation of desirable bacteria. This species is documented to have a wide pH and temperature range. It also improves digestion and reduces lactose intolerance and constipation. Most often L. casei is industrial, specifically for diary production....

Lactobacillus acidophilus
2011-04-18 21:52:41

Lactobacillus acidophilus is a species in the genus Lactobacillus. It is a homo-fermentative species, fermenting sugars into lactic acid, which grows readily at rather low pH values and has an optimum growth temperature of 37 °C. It occurs naturally in the human and animal gastrointestinal tract, mouth, and vagina. Some strains have probiotic characteristics. Strains are commercially used in...

Helicobacter pylori
2011-04-15 15:38:47

Helicobacter pylori is a Gram-negative, microaerophilic bacterium that can inhabit various areas of the stomach, particularly the antrum. It causes low-level inflammation of the stomach lining and is linked to gastric ulcers and stomach cancer. Out of those infected, 80%, are asymptomatic. It was initially named Campyloacter pyloridis and then renamed C. pylori to correct the Latin grammar...

Word of the Day
  • To talk saucily.
  • Insolent, opprobrious language; impertinent abuse.
This word is Scots in origin and probably imitative.