Skeletal System. w Adult Human has 206 Bones w This slideshow will offer fun ways to remember the...
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Skeletal System
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Skeletal System Adult Human has 206 Bones This slideshow will offer fun ways to remember the names of some of the
bones, and you can come up with your own tricks!
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Functions of Skeletal System
Framework—support body’s muscles, fat, and skin
Levers—muscles attach to bones to help provide movement
Protection of vital organs Production of blood cells Storage of calcium
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Skull
Cranium• Frontal• Parietal• Temporal• Occipital
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Skull
Face• Maxilla (upper lip- “Max has a
mustache”)• Mandible (chinbone- “my, you
have a manly chin”)• Zygoma• Nasal bones
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Spinal Column
Cervical: 7 vertebrae Thoracic: 12 vertebrae Lumbar: 5 vertebrae Sacrum: 5 vertebrae
(fused) Coccyx: 4 vertebrae
(fused)
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Thorax: Protects heart, lungs
12 pairs of ribs• First seven pairs are true
ribs because they attach directly to the sternum
• Next five are called false ribs—the first three pairs of these attach to the cartilage of the pair above, and the last two are called “floating” because they have no attachment on the front of the body
Sternum
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Pelvis
Bony ring Two innominate
bones, each made of 3 fused bones• Ilium• Ischium• Pubis
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Lower Extremity
Femur (largest bone in body)
Patella (knee cap) Tibia (shin bone) Fibula (if you tell a fib,
you’re “talking out of the side of your mouth” and this bone is on the side of your leg)
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Lower Extremity
Calcaneous Tarsals (think of hot
tar on your feet!) Metatarsals (longer
word, longer bones) Phalanges
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Upper Extremity Shoulder girdle
• Scapula (s=shoulderblade)
• Clavicle (c=collarbone)
Humerus Radius (put your thumb up
and say Right on!—Radius, Right on!)
Ulna (in same position, Ulna, Underneath)
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Upper Extremity
Carpals (they’re your Car Pals, they help you drive your car)
Metacarpals (longer word, longer bones)
Phalanges
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Joints
Joining points of bones Bone-ends covered with cartilage Ligaments connect bone-to-bone Inner surface of joint capsule lined with
synovial membrane• Produces synovial fluid
• Lubricates joint
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Extremity Trauma
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Fracture Causes
Direct force Indirect force Twisting forces Diseases of bones can lead to fractures
• Osteoporosis—softening of the bone• Tumors• With disease processes, ask “did the fall cause
the fracture or did the fracture cause the fall?”
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Open vs. Closed Fractures (fxs)
Closed (simple)= skin over fracture site intact
Open (compound) = break in skin over fracture site• Bone ends do not have to be exposed• Small opening in skin communicating with
fracture site = open fx• Open fractures more serious due to external
blood loss, possible infection
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Fractures
•One of the most important things is to prevent closed fractures from becoming open ones.
•With a compound fracture be extremely careful with the bone ends—they can be sharp and cause a blood exposure
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Fracture Types
Greenstick: common in children, incomplete fracture
Colles: “s” shaped fracture of the radius, often due to victim trying to break a fall by outstretching his or her arms
Spiral: common in ice skating, due to twisting motion
Greenstick
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Fracture Types
Comminuted: fractured Depressed (skull): bone sunken in
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Fracture Signs: DOTS
Deformity Open Injury Tenderness Swelling
What other signs/symptoms do you think you might see/the patient might feel?
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Fracture Signs
Swelling Pain Guarding (patient won’t move injury) Crepitus
• Grating of bone ends• May be heard or felt• Do NOT actively seek
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Dislocation
Displacement of bones from normal positions at joint
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Dislocation Signs and Symptoms
Deformity Swelling around joint Pain/tenderness in joint Loss of motion usually perceived as
“locked” joint
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Sprains
Injury to ligaments Bone ends NOT
displaced from normal positions
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Sprain Signs
Tenderness Swelling, ecchymosis Inability to use extremity No deformity
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Management
Splinting• Prevents further movement at injury site
• Eases pain
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Management
It is often difficult to tell the difference between fractures, dislocations and sprains
When in doubt, get it checked out!
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Principles of Splinting
Do NOT move patients before splinting unless patient is in danger
Remove clothes to allow inspection of limb Note and record circulation, sensation,
and movement of fingers or toes distal to injury before AND after splinting
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Principles of Splinting
Fractures: splint joint above AND below fracture
Dislocations: splint bone above AND below joint
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Principles of Splinting
Minimize movement Support injury until splinting completed Pad splint to avoid local pressure
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Arthritis
Group of diseases involving inflammation of the joints
Two main types are osteoarthritis (most common) and rheumatoid arthritis
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Bursitis
Inflammation of the bursae
(small, fluid-filled sacs
surrounding the joints)
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Osteomyelitis
Bone inflammation usually caused by a pathogenic organism
Signs/symptoms include pain at the site, swelling, chills, fever
Treatment = antibiotics
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Osteoporosis
Softening of the bones Caused by hormone deficiency,
sedentary lifestyle, and prolonged lack of calcium in the diet
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Osteoporosis
Prevention/Treatment: increased intake of calcium and vitamin D, medications to increase bone mass, exercise, exposure to sunlight, estrogen replacement
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Curvature of the Spinal Column
Kyphosis, scoliosis, and lordosis
Treated with therapeutic exercises, firm mattresses, and braces
Surgical repair for severe cases
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Ruptured Disk
Also called herniated or slipped disk
Most common site is at the lumbar-sacral area