(See also Introduction to Periodontal Disease.) Trench mouth is a painful infection of the gums, causing pain, fever, and sometimes fatigue. If the normal bacteria in the mouth overgrow, the gums can become infected. The gums hurt, and people sometimes have extremely bad breath.
The Elements of Art and Design: A continuous mark made on a surface by a moving point; it may be flat (pencil line) or three-dimensional (a rod, groove, ridge, etc.) Line may be explicit - a line painted along the edge of the road - or implied by the edge of a shape or form.
Assemblage art is non-traditional sculpture, made from re-combining found objects. Some of these objects are junk from the streets. It is doubtful that this form of art could have existed before the 20th century. We needed copious stuff to have this art form.