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Unit 3 Part 1B Notes -- Prominences and Depressions in Bone

 

  1. Bone Depressions or Cavities

 

  • 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)

            

  • Fossa – Shallow depression in bone (socket).

                 

        Glenoid Fossa (Cavity) in the Shoulder                                                           Acetabular Fossa (Acetabulum)

 

  • 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

 

  • Meatus – Canal or tube-like passageway.

 

                 The Auditory Meatus or "Ear Canal"

 

  • Fissure – Narrow slit.

 

      The slits you see are the Superior Orbital Fissures in the Eye Socket

 

  • Sinus (Antrum) – Cavity (space) in bone.

 

  1. Bone Prominences

 

  • Condyle – Rounded knuckle-like process where bones articulate.

 

 

  • Tuberosity – Large roughened process which serves as site for muscle attachment.

 

  • Tubercle – Small rounded process.

 

  • Trochanter – Very large process on a bone.

 

  • Head – Portion supported by smaller part (Neck).

 

  • Crest – Narrow ridge of bone.  When the iliac crest is bruised, it is called a hip pointer

 

  • Spine – Sharp, slender process.

 

 

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