1. Skeletal System

2. 4 – Research infectious agents and how the body systems work together to fight the infection and maintain homeostasis.
3 – Understand the general functions of the body systems and how infectious agents may affect the systems. Identify ways the body systems interact to maintain homeostasis.
2 – Explain the term homeostasis. Describe each body system.
1 – Identify body systems.

3. 4 Functions of the Skeletal System
1. Supports the body. The backbone is the main support center for the upper body. It holds your head up and protects your spinal cord. 2. Protects internal organs: The bones of your skull protect your brain. Your ribs protect your lungs and heart from injury

4. 4 Functions of the Skeletal System
3. Works with Muscles to produce movement: Skeletal system provides points of attachment for muscles. Your legs and arms move when the muscles pull on the bones. 4. Production & Storage: Red blood cells produced in bones. Bones store fat and calcium

5. Why do we need a skeletal system?
Think Pair Share
Why do we need a skeletal system?

6. Bone Structure Four Layers: Periosteum: Covers Bones Compact Bone:
Lies beneath the periosteum
Spongy Bone:
Lies beneath the compact bone
Bone Marrow:
Fills the gaps between the spongy bone

7. Cartilage: It acts as a cushion between bones at a joint and protects the bones.

8. Joints of the Body
Ball and Socket Joint: Round end of bone fitting snuggly within another bone.
Ex. Shoulder and Hip

9. Joints of the Body
Hinge Joint: Movement at joint in one direction like a door.
Ex. Knee and Elbow

10. Joints of the Body
Pivot Joint: one bone rotates in the ring of another bone.
Ex. Neck, Wrist and Ankles

11. Gliding Joint: Bones glide over another bone.
Joints of the Body
Gliding Joint: Bones glide over another bone.
Ex. Knuckles

12. Think Pair Share
Imagine that your joints no longer work. How would this change life as you know it?

13. Problems of the Skeletal System
Fracture: Break
Dislocation: Out of joint

14. Problems of the Skeletal System
Sprain: Swelling in the joint
Arthritis: Inflamed and stiff joints

15. Problems of the Skeletal System!!
Scoliosis: Curvature of the spine
Osteoporosis: Brittle bones

16. How do these issues affect the body’s homeostasis?
Think Pair Share
How do these issues affect the body’s homeostasis?

17. Homeostasis
Homeostasis
System Interactions
An organism’s ability to maintain a stable internal environment.
Works with muscles and nerves to respond to stimuli
Supplies calcium to nerves, muscles, and heart.

18. Think Pair Share
Katie bends down to pet the puppy. Then she quickly pulls her hand back when it growls. What systems are interacting with the skeletal system?

19. 4 – Research infectious agents and how the body systems work together to fight the infection and maintain homeostasis.
3 – Understand the general functions of the body systems and how infectious agents may affect the systems. Identify ways the body systems interact to maintain homeostasis.
2 – Explain the term homeostasis. Describe each body system.
1 – Identify body systems.