Load - ANSWER An external force acting on the body causing internal reactions within
the tissue
stifness - ANSWER Ability of a tissue to resist load
Greater stifness= greater magnitude load can resist
Stress - ANSWER internal resistance to load
strain - ANSWER internal change in tissue (length) resulting in deformation
Yield point - ANSWER Point at which elasticity is almost exceeded is the yield point.
If deformation persists, following release of load permanent or plastic changes result
when yield point is far exceeded mechanical failure occurs resulting in damage.
Elasticity - ANSWER Property that allows a tissue to return to normal following
deformation
Tension - ANSWER Force that pulls and stretches tissue
Compression - ANSWER Force that results in tissue crush-two forces applied towards
one another
Shearing - ANSWER Force that moves across the parallel organization of tissue
1
, Bending - ANSWER two force pairs act as opposite ends of a structure.. tension and
compression forces.
three forces cause bending.
already bowed structures encounter axial loading
common in bone
Torsion - ANSWER Loads caused by twisting in opposite directions from opposite ends.
twisting of that bone; muscle involved
Both torsion and bending - ANSWER Results in a tear
Noncontractile - ANSWER ligaments, skin, cartilage, capsules, fascia, dura mater, and
nerve roots
contractile - ANSWER involves muscles and its parts: tendons and bony insertions
Friction blister - ANSWER continuous rubbing over skin surface that causes a collection
of fluid below or within the epidermal layer
Abrasion - ANSWER skin is scraped against a rough surface resulting in capillary
exposure due to skin removal
Skin bruise (contusion) - ANSWER compression or crush injury of skin surface that
produces bleeding under the skin
Laceration - ANSWER wound in which skin has been irregularly torn
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the tissue
stifness - ANSWER Ability of a tissue to resist load
Greater stifness= greater magnitude load can resist
Stress - ANSWER internal resistance to load
strain - ANSWER internal change in tissue (length) resulting in deformation
Yield point - ANSWER Point at which elasticity is almost exceeded is the yield point.
If deformation persists, following release of load permanent or plastic changes result
when yield point is far exceeded mechanical failure occurs resulting in damage.
Elasticity - ANSWER Property that allows a tissue to return to normal following
deformation
Tension - ANSWER Force that pulls and stretches tissue
Compression - ANSWER Force that results in tissue crush-two forces applied towards
one another
Shearing - ANSWER Force that moves across the parallel organization of tissue
1
, Bending - ANSWER two force pairs act as opposite ends of a structure.. tension and
compression forces.
three forces cause bending.
already bowed structures encounter axial loading
common in bone
Torsion - ANSWER Loads caused by twisting in opposite directions from opposite ends.
twisting of that bone; muscle involved
Both torsion and bending - ANSWER Results in a tear
Noncontractile - ANSWER ligaments, skin, cartilage, capsules, fascia, dura mater, and
nerve roots
contractile - ANSWER involves muscles and its parts: tendons and bony insertions
Friction blister - ANSWER continuous rubbing over skin surface that causes a collection
of fluid below or within the epidermal layer
Abrasion - ANSWER skin is scraped against a rough surface resulting in capillary
exposure due to skin removal
Skin bruise (contusion) - ANSWER compression or crush injury of skin surface that
produces bleeding under the skin
Laceration - ANSWER wound in which skin has been irregularly torn
2
