- Bone Depressions or Cavities
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Foramen – Opening that provides a passageway for nerves or blood vessels.
Foramen magnum in the skull
Transverse and Vertebral Foramen in vertebrae
Foramen obturator in the Os Coxa (hip)
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Fossa – Shallow depression in bone (socket).
Glenoid Fossa (Cavity) in the Shoulder Acetabular Fossa (Acetabulum)
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Sulcus – Groove in bone.
Bicipital Sulcus (Groove) in Proximal Humerus
In the picture below the tendon of the long head of biceps fits into the bicipital sulcus of the humerus
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Meatus – Canal or tube-like passageway.
The Auditory Meatus or "Ear Canal"
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Fissure – Narrow slit.
The slits you see are the Superior Orbital Fissures in the Eye Socket
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Sinus (Antrum) – Cavity (space) in bone.
- Bone Prominences
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Condyle – Rounded knuckle-like process where bones articulate.
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Tuberosity – Large roughened process which serves as site for muscle attachment.
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Tubercle – Small rounded process.
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Trochanter – Very large process on a bone.
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Head – Portion supported by smaller part (Neck).
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Crest – Narrow ridge of bone. When the iliac crest is bruised, it is called a hip pointer
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Spine – Sharp, slender process.