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BONE DEPRESSIONS - LESSON 207

BONE DEPRESSIONS: They are the hollow regions or the openings found in the bones.  The bone depressions attach the bone to the other bone.  They serve as the route or passageways for nerves and blood vessels.  There are five types of bone depressions.  They are fossa, sinus, sulcus, fissure, and foramen. Now will learn the types  of bone depressions one by one.  1.  Fossa:  These are the bony depressions are shallow cavities.  They are found inside the bones or on the bones. 2.  Sinus:  These are the depression of the bone that are found within bone.  Sinuses are hollow cavities in strucutre. 3.  Sulcus:  These type of bony depressions look like grooves or furrow in structure. 4.  Fissure:  They are a kind of bony depressions that are found on the bone.  They are narrow in size.  Fissures are deep slit like openings are found on the bone. 5.  Foramen:  These type of bony depressions act as the openings for nerves and blood vessels. They are also found on the bone.