Bone Markings

Tuberosity

Projection: Large rounded projection of bone; may be roughened

Crest

Projection: Narrow ridge of bone; usually prominent

Trochanter

Projection: Very large, blunt, irregularly shaped process (the only examples are on the femur)

Line

Projection: Narrow ridge of bone; less prominent than a crest

Tubercle

Projection: Small rounded projection or process

Epicondyle

raised area on or above a condyle

Spine

Projection: Sharp, slender, often pointed projection

Process

Projection: Any bony prominence

Head

Surface: Bony expansion carried on a narrow neck

Facet

Surface: Smooth, nearly flat articular surface

Condyle

Surface: Rounded articular projection, often articulates with a corresponding fossa

Ramus

An extension of bone making an angle with the rest of the structure

Fissure

Depression/Opening: Narrow slit-like opening

Foramen

Depression/Opening: Round or oval opening through a bone

Notch

Indentation at the edge of a structure

Meatus

Depression/Opening: Canal-like passageway

Sinus

Depression/Opening: Cavity within a bone, filled with air and lined with mucous membrane

Fossa

Depression/Opening: Shallow basinlike depression in a bone, often serving as an articular surface