SKELETAL SYSTEM

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SKELETAL SYSTEM Powered By Docstoc
					              BELLRINGER
• Discuss how your life would change if you
  had a problem with your skeletal system.
  For example, with a broken bone, how
  would your day-to-day activities change?
SKELETAL SYSTEM
               OBJECTIVES
• Define the function of the skeletal system
• Name and identify the bones in the skeletal
  system
• Describe the structure and function of bones
• Compare the various types of joints
            SKELETAL SYSTEM
• The skeletal system is all the bones in the body
  and the tissues such as tendons, ligaments, and
  cartilage that connect them.
• Also includes your teeth
• Your skeletal system is made up not only of bones
  but of cartilage, a strong, flexible connective
  tissue
• The skeletal system gives your body the shape it
  has
• The skeleton is a framework of bones that
  support the muscles and organs and protect the
  inner organs.
  Functions of the Skeletal System
• Has a number of vital functions
• The skeleton plays a crucial role in movement by
  providing a strong, stable and mobile framework
  on which muscles can act
• Also supports and protects your delicate internal
  organs
• Bones are living structures with 5 functions:
  –   Protect internal organs
  –   Support the body
  –   Make blood cells
  –   Store minerals
  –   Provide for muscle attachment
• When you were born you had over 300 bones. As
  you grew, some of these bones began to fuse
  together. As a result, an adult has only 206 bones
                  CRANIUM




• Protects the brain and eyes
• Common name: Skull
              MANDIBLE




• Common name: Jawbone
                  CLAVICLE




• Supports the arms
• Common name: Collarbone
• Bone that is broke the most in the body
                SCAPULA




• Common name: Shoulder blade
                      RIBS




• Protects the heart and lungs
VERTEBRAE
•Protects the spinal cord
•Common name: Spine
• Scoliosis is a lateral, or side
to side, curvature of the
spine.
UPPER EXTREMITY
    HUMERUS




• Common name: funny bone
      ULNA




• Longer of the two bones of the forearm
• Palm out- inside bone/closest to the body
     RADIUS




• Shorter of the two bones of the forearm
• Bone to the thumb side
               PHALANGES




• The human hand has 27 bones
• Common name: fingers
                PELVIS




• Common name: Hip
LOWER EXTREMITY
        FEMUR




• The longest bone in the body
• Usually about 25%(1/4) of a person’s height
• Common name: thigh bone
                PATELLA




• Protects knee joint
• Common name: Kneecap
  TIBIA




• Supporting bone for lower leg
• Common name: shinbone
    FIBULA




• Doesn’t give much support
• Main function is to provide attachment for
  muscles
              PHALANGES




• Common name: toes
                    AXIAL SKELETON




• Includes the 80 bones of the skull, spine, ribs, and sternum, or breastbone.
  The vertebrae, the small bones that make up your spine, protect your
  spinal cord. The ribs, most of which are attached to the sternum in your
  chest and to the vertebrae of your spine, protect your lungs and heart.
        APPENDICULAR SKELETON




• Includes the 126 bones of the shoulders, arms, hands, legs,
  and feet. It helps you perform a wide range of movement.
                  Types of Bones
• Bones are grouped according to their shapes
• 4 basic types in the human body: long, short, flat, and
  irregular
• Long Bones
   – Like the femur, are found in the arms and legs
• Short Bones
   – Like those in wrists and ankles, are as broad as they are
     long
   – More than half are found in hands and feet
• Flat Bones
   – Like ribs and skull bones, have a thin, flat shape.
   – Generally serve to protect vital organs
• Irregular Bones
   – Like vertebrae, have a shape that does not fit into any of
     the other three categories
• Joints are the point at which two bones meet
• Ligaments are tough bands of fibrous, slightly elastic tissue that
  bind the bone ends at the joint
• Tendons are fibrous cords that join muscle to bone or to other
  muscles
       BALL AND SOCKET JOINT




• This type of joint allows the widest range of
  movement: backwards, forward, sideways, and in
  a circle.
  – Examples: shoulder and hip joints
                   PIVOT JOINT




• In a pivot joint, a bony projection allows rotation.
   – Example: joint between the first two vertebrae in the
     neck that allows your head to rotate
            ELLIPSOIDAL JOINT




• In a joint like the one in your wrist, an oval
  shaped part fits into a curved space. This allows
  all types of movement except pivotal.
                HINGE JOINT




• Allows bending and straightening, as in fingers.
  The knee and elbow are hinge joints that also
  allow some degree of rotation.
Bone Structure
•Calcium and phosphorous
are two important minerals
in a bone that makes it
strong (Drink Milk)
• The hollow space in the
middle of bones is filled with
bone marrow.
• Two types of bone tissue,
one is spongy and the other
is compact, each has a
different arrangement of
bone cells
• Periosteum is the
membrane that covers bones
•Eat healthy & Exercise
 Differences in Males and Females
• Males and females have a slightly different
  skeletons, including a different elbow angle
• Males have slightly thicker and longer legs and
  arms
• Females have a wider pelvis and a larger space
  within the pelvis, through which babies travel
  when they are born
SKELETAL SYSTEM

				
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posted:4/17/2013
language:English
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