Parasitism is a relationship in which one organism (the parasite) benefits while the other(the host) is harmed. This is a positive, negative relationship. (Campbell)( Dionne L Rice Jr) The parasite usually lives on or inside the other organism. For example, mosquito is a parasite, feeding on a human while transferring the disease called Malaria.
Artificial brush fibres are most commonly made of nylon and polyethylene, though vinyl and steel wire are also used for certain applications. Nylon fibres are either tapered and split like hog bristles for use in paintbrushes or left untapered for making cleaning brushes, hair brushes, and toothbrushes.
Transcript of The Innovations of a Toothbrush. Innovations of the Toothbrush (cc) image by jantik on Flickr Dates all the way back to 3500 b.c and 1498 The Origin of the Toothbrush On June 26, 1498, a chinese emperor created the first bristle toothbrush. Around 3500 b.c ancient Romans and Greeks used chewing sticks as a Toothbrush.