(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.
Color The element of art derived from reflected or absorbed light. Color adds interest and mood to a work of art. It is also referred to as Hue. The primary colors are red, yellow and blue. The secondary colors are created by mixing the primary colors. They are purple (violet), orange and green.