A ceiling fan is a mechanical fan, usually electrically powered, suspended from the ceiling of a room, that uses hub-mounted rotating paddles to circulate air.
Escherichia coli (E. coli) bacteria normally live in the intestines of people and animals. Most E. coli are harmless and actually are an important part of a healthy human intestinal tract. However, some E. coli are pathogenic, meaning they can cause illness, either diarrhea or illness outside of the intestinal tract.
The normal flora are bacteria which are found in or on our bodies on a semi-permanent basis without causing disease. There are more bacteria living in or on our bodies, than we have cells of our own. A human body contains around 10 13 cells.The human body is home to around 10 14 bacteria.One fourth of fecal weight is made of bacteria! The normal flora are particularly important in the large intestine.here are more bacteria living in or on our bodies, than we have cells of our own. A human body contains around 10 13 cells. The human body is home to around 10 14 bacteria. One fourth of fecal weight is made of bacteria!