Life Science 1.2 : The Skeletal System

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  • 1. Life Science : 1.2
    The Skeletal System
  • 2. Objectives:
    Identify the major organs of the skeletal system.
    Describe four functions of bones.
    Describe three types of joints.
    List three injuries and two diseases that affect bones and joints.
  • 3. Bones
    Bones, cartilage, and the connective tissue that holds bones together make up your skeletal system.
    Bone Structure
    Bone tissue without any visible open spaces is called compact bone.
    Bone tissue that has many open spaces is called spongy bone.
    Bones contain a soft tissue called marrow.
    Bone Growth
    Most bones start out as a flexible tissue calledcartilage.
    Eventually, most cartilage is replaced by bone.
  • 4. 4 functions of Bones
  • 5. Joints
    Joint
    Place where two or more bones meet.
    Joints are held together byligaments.
    Three Joints:
  • 6. Skeletal System Injuries and Diseases
    Bones may be fractured or broken.
    Ligaments can be stretched or torn.
    Arthritis is a disease that causes the joints to swell or stiffen.
    Osteoporosis is a disease that causes bones to become less dense.