A&P: Bone Terms- Bone Markings

Canal

An opening not through a bone, but made from other bones stacking on top of each other. Ex. Vertebra

Sinus

• Definition: Cavity within a bone • Ex. Frontal sinus of frontal bone

Head

• Definition: Enlargement on the end of a bone. • Ex. Head of humerus

Tuberosity

• Definition: Knoblike process usually larger than a tubercle. • Ex. Radial tuberosity of radius

Crest

• Definition: Narrow, ridgelike projection. • Ex. Lilac crest of illum

Foramen

• Definition: Opening through a bone that usually is a passageway for blood vessels, nerves, or ligaments. • Ex. Foramen magnum of occipital bone

Epicondyle

• Definition: Projection situation above a condyle • Ex. Medial epicondyle of humerus

Process

• Definition: Prominent projection on a bone. Extends off a bone. • Ex. Mastoid process of temporal bone

Fossa (larger)

• Definition: Relatively deep pit or depression. Looks to receive another bone. Dish like depression. • Ex. Olecranon fossa of humerus.

Trochanter

• Definition: Relatively large process. • Ex. Greater trochanter of femur

Condyle

• Definition: Rounded process that usually articulates with another bone. • Ex. Occipital bone

Tubercle (smaller)

• Definition: Small, knoblike process. • Ex. Greater tubercle of humerus

Facet (smaller)

• Definition: Small, nearly flat surface. Dish like depressions. • Ex. Rib face of thoracic vertebra.

Fissure

• Definition: The deep grooves in the surface of the cerebrum.

Spine

• Thornlike projection • Spine of scapula

Neck

Where the head rounds off.