Transcript Muscular and Skeletal systems

Muscular System…
The body has over
600 muscles.
 They are soft
tissues.
 Tiny jolts of
electricity called
electrical impulses
travel through the
nerves to the
muscles.
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Muscular System…
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This jolt of electricity
allows the muscle to
contract.
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When the jolt is not
there the muscles
relax.
Muscles to know:
Triceps
 Biceps
 Quadriceps
 Hamstrings
 Abdominals
 Deltoid
 Chest Muscles
 Calf Muscles
 Groin Muscles
 Face Muscles
 Gluteus Muscles
 Back Muscles
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Types of Muscle
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Skeletal – attaches to the skeleton to help
you move.
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Smooth – is found in organs and in
skeletal muscle.
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Cardiac- only found in the heart.
Anatomy of a Muscle
Skeletal System…
Approx. 206 bones
in the human body.
 Main job is to
support and protect.
 Bones have a rich
supply of blood and
nerves.

If broken on a growth
plate, may affect future
growth.
The gradual weakness of
the skeletal system
where the bones turn
brittle is called
osteoporosis.
Skeletal System
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The inner tissue of
the bone is called the
marrow.
Things made, stored
or found in the
marrow:
 red blood cells
 blood vessels
 nerves
Bones to know:
 Skull
 Mandible
 Sternum
 Scapula
 Ribs
 Spine
 Pelvis
 Humerus, Ulna, Radius
 Carpal, Metacarpals
 Phalanges
 Patella
 Femur,Tibia, Fibula
 Tarsals, Metatarsals

Anatomy of a Bone
Types of Joints…Where bones
and muscles end or begin

Ball and Socket
 Tri-Axial

Hinge

Gliding
All allow the body to
move.

Pivot

Saddle

Condyloid
Things that help the Joints…

Ligaments – connects bone to bone
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Tendons – connects muscle to bone

Cartilage - cushioning
Types of Injuries…

Fractures
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 A complete break, a
 Tearing of ligaments
chip, or a crack in the
bone
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Dislocations
 The movement of a
bone at a joint away
from it’s normal
position
Sprains
at a joint.
 They swell but usually
heal.

Strains
 Stretching or tearing
of muscles or tendons
Signals of Serious Muscle, Bone
or Joint Injuries…
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Significant deformity
Bruising and swelling
Inability to us the affected part normally
Bone fragments sticking out of wound
Person feels bones grating; felt or heard a
snap or pop at the time of injury
Injured area is cold and numb
Cause of the injury suggests that the injury
may be severe.
How can you tell it’s that bad?
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Often you don’t
know.
X - Ray_
Computer aided
Tomography or CAT
Scan
Magnetic
Resonance Imaging
or MRI

R - Rest

I - Immobilize
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C - Cold
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E - Elevate
If a splint is needed…
Anatomic – the person’s body
is the splint
 Soft – Materials such as towels, pillows,
blanket or a sling.
 Rigid – Boards or folded magazines are
used.
 The Ground
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Head, Neck, and Back Injuries
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Signals
Neck or Back Pain
Tingling or
weakness in the
extremities
Not alert_
Appears to be
intoxicated.
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What to do…
Hold head with both
hands to keep from
moving.
Do not remove
helmet
If unconscious, keep
airway open with the
jaw thrust.