Vinyl chloride, chloromethane and the banned pesticide DDT are examples of chlorinated hydrocarbons. Chlorinated hydrocarbons are organic molecules wherein chlorine has been substituted for some of...
Resident flora of certain areas plays a definite role in maintaining health and. normal function. Members of the resident flora in the intestinal tract synthesize. vitamin K and aid in the absorption of nutrients. On mucous membranes and. skin, the resident flora may prevent colonization by pathogens and possible. disease through âbacterial interference.â The mechanism of bacterial interference. is not clear.
Normal Flora. Millions and millions of healthy bacteria, called normal flora, colonize the outside of your skin. These bacteria live on your skin and use dead skin cells for their energy. Though normal flora bacteria are not usually harmful, they can cause infections if they enter your body through a wound.Most of these organisms are considered healthy bacteria because they prevent very harmful bacteria, called pathogens, from growing on your skin.hough normal flora bacteria are not usually harmful, they can cause infections if they enter your body through a wound. Most of these organisms are considered healthy bacteria because they prevent very harmful bacteria, called pathogens, from growing on your skin.