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Your Skeletal System

Your Skeletal System. The Body’s Framework. Skeletal System. Your body’s framework is called the skeletal system Skeletal system – is an internal system made up of bones, joints, and connective tissue. Bones. The 206 bones that shape your skeleton are living tissue, composed of cells.

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Your Skeletal System

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  1. Your Skeletal System The Body’s Framework

  2. Skeletal System • Your body’s framework is called the skeletal system • Skeletal system – is an internal system made up of bones, joints, and connective tissue.

  3. Bones • The 206 bones that shape your skeleton are living tissue, composed of cells. • Besides providing a framework for your body, bones perform many other important functions:

  4. Bones • Allow movement: Bones provide point of attachment for different muscles. Legs and arms move then muscles pull on bones. • Provide support: Your backbone is made up of 24 bones called vertebrae (VER-tuh-bray). These bones protect your head and upper body and protect your spinal cord.

  5. Bones • Protect other parts of your body: -Your bones provide a framework that supports your body’s internal organs. -Your skull protects your brain. -Your ribs protect your lungs and heart from injury

  6. Bones • Form new blood cells: Bones play a role in your circulatory system, too. Red and white blood cells are formed by marrow – a tissue in the center of some bones. • Store minerals: Bones store minerals such as calcium and phosphorus for use when needed by the body.

  7. Recall • Which bones protect your heart and lungs? • How many bones are in your body? • The backbone is made up of how many bones? And what is it called?

  8. Joints • Joints are the points at which the bones meet - Hinge joints (elbows and knees) move in one direction only. - Gliding joints (wrists and ankles) enable bones to slide over one another. • The pivot joint (between the neck and head) moves the head from side to side and up and down and allows for limited rotation. • Ball-and-socket joints (hips and shoulders) move in all directions, allowing complete rotations

  9. Connective Tissue • The bones in your skeletal system are linked to each other and to muscles by strong connective tissues. There are three types: • Cartilage – strong flexible tissue that provides cushioning at your joint. Nose and ears are made of cartilage. • Ligaments – Strong cords of tissue that connect the bones in each joint. Ligaments hold bones in place. • Tendons – Tough bands of tissue that attach your muscles to bones. You can feel a large tendon called Achilles.

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