Projecting parts are components of a structure that extend outward from the main body. Saliences, knobs, and LIMBS are all examples of projecting parts. Saliences are protrusions that are usually found on the edges of a structure, while knobs are small, round projections that are often used as handles or grips. LIMBS are longer, more slender projections that are typically used to support a structure. Salients are similar to saliences, but they are more pronounced and stand out more prominently.