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Lesson 3 Bones
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Lesson 3 Bones

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  • 1. Lesson 3: The Skeletal and Muscular Systems
    • Objectives:
    • Identify the major parts of the skeletal system and discuss the function of the system within the body
    • Identify the major parts of the muscular system and discuss the function of the system within the body
    • Page 128
  • 2. Lesson 3: Words to Know
    • Skeletal system - the framework of bones and other tissues that support the body
    • Muscular system - consists of tissues that move parts of the body and operate internal organs
  • 3. Lesson 3: Things to Know
    • A newborn baby has over 300 soft bones
    • An adult skeleton has 206 bones
    • Ribs (12 pairs - same number for men and women)
    • Each upper limb has 32 bones:
      • 2 in shoulder
      • 3 in arm
      • 8 in wrist
      • 19 in hand and fingers
  • 4. Lesson 3: Things to Know
    • Each lower limb has 31 bones
      • 1 in hip (one each side of pelvis)
      • 4 in leg
      • 7 in ankle
      • 19 in foot and toes
    • Largest bone in your body is pelvis or hip bone.
      • It is made of six bones joined firmly together.
  • 5. Lesson 3: Things to Know
    • Longest bone in body is the femur located in the thigh.
    • Smallest bone in body is the stirrup located deep in the ear. It is hardly larger than a grain of rice.
    • Bones contain a lot of calcium (an element found in milk, broccoli, and other foods).
  • 6. Lesson 3: Things to Know
    • Joints are location where bones come together. There are three types of joints:
      • Immovable - skull’s cranium
      • Slightly moveable - vertebrae of the spine
      • Freely movable - four types
        • hinge - knee and elbows
        • pivot - neck
        • ball and socket - shoulder and hip
        • gliding - wrist and ankles
  • 7. Lesson 3: Words to Know
    • Pivot - the end of one bone rotates inside a ring formed by another. The joint can move up and down and from side to side.
    • Gliding - one part of a bone glides over another bone, allowing a small range of sideways movement.
  • 8. Lesson 3: Words to Know
    • Ball and Socket - the spherical head of one bone moves inside the cup-shaped socket of another. The joint can move in all directions.
    • Hinge - joint moves in only one direction, like a door hinge.