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.