2.  The small intestine is one of the organs that help the digestive and excrementory processes  The small intestine is mad up of 3 parts 1. Duodenum 2. Jejunum 3. Ileum

3.  The small intestine contains many distinct types of cells, each of serve a specific function.  Enterocytes Cell  Goblet Cell  Paneth Cell  Enteroendocrine Cell  Microfold Cell  Undifferentiated Cells

4.  Enterocytes absorb amino acids and monosaccharides by active transport, these cells last about 5-6 days  The Goblet Cells secretes the mucus that lubricates the passage where food passes by and protects it from digestive enzymes, lifespan is also of 5-6 days  Paneth Cells pagothyze some bacteria and protozoa, they also contain antibacterial enzymes  Enteroendocrine Cells they produce cholecystokinin, which stimulates pancreatic enzyme production and alos inhibits gastric acid secretion  Microfold cells endocytose antigens and transport them to the underlying lymphoid cells  Underdifferentiated cells are destines to be goblet cells or goes through 2 divisions

6.  http://www.courseweb.uottawa.ca/me dicine- histology/english/Gastrointestinal/gastro_ small_intest.htm http://www.courseweb.uottawa.ca/me dicine- histology/english/Gastrointestinal/gastro_ small_intest.htm  http://www.britannica.com/EBchecked/ media/107046/The-small-intestine- contains-many-distinct-types-of-cells- each http://www.britannica.com/EBchecked/ media/107046/The-small-intestine- contains-many-distinct-types-of-cells- each  http://en.wikipedia.org/wiki/Small_intesti ne http://en.wikipedia.org/wiki/Small_intesti ne