Saccharomyces boulardii. Saccharomyces boulardii is a tropical species of yeast first isolated from lychee and mangosteen fruit in 1923 by French scientist Henri Boulard. S. boulardii (synonym: S. cervisiae var boulardii and Saccharomyces cerevisiae Hansen CBS 5926) is a yeast that could be assigned to the subtype of S. cerevisiae species.
Layers of the Stomach. Stomach has gastric pits, which has gastric glands that secrete acids. The mucosa forms folds called rugae that look like wrinkles and flatten as your stomach gets full. Here's more about the layers of the stomach. 1. Mucosa. This is the innermost layer of the stomach.
The stomach lining is covered by a protective layer of mucus. Glands in the stomach produce mucus, hydrochloric acid and an inactive enzyme called pepsinogen. In the stomach cavity, the hydrochloric acid changes the pepsinogen into an active digestive enzyme called pepsin. This enzyme digests proteins. The mucus layer acts as a barrier which prevents the stomach lining from being attacked by pepsin and acid. If the mucus layer in the stomach is thinned or removed, which may happen during an infection by a bacterium called Helicobacter pylori, pepsin and acid may be able to attack the stomach lining. The infection can cause inflammation (gastritis) and sores called ulcers.