The Skeletal SystemDunkirk Middle School – Health 7

Numbered Heads Together

• On your own, write down a response for the following question – How would your life be different without your skeletal system?

• When Mr. Green says “Go” share your response with your table and come up with a response for the table. Each member should be prepared with a response to share out with the class in case they are selected.

Based on the conversation we just had, write down what you think the 5 jobs of the skeletal system are…

Job #1 - Protection

Job #2 – Allow You To Move

Job #3 – Provide Shape and Support

Job #4 – Produces Blood Cells

Job #5 – Stores Calcium (60% bone)

Group Questions:

Why would our bones being 100% solid be a bad thing?

Why do we have less bones now than we did as a baby?

Name three different bones and a trick you could use to remember them.

Bone Structure

JointsDefinition – A place in the body where two or more bones join together.

Two Categories – Moveable and Immoveable

Ligaments – Strings of connective tissue that holds two or more bones together in a joint.

Cartilage – Connective tissue at the ends of most bones within a moveable joint to reduce the effects of friction.

Immoveable Joints

Also known as fixed joints. These are places in the body where two or more bones join together but do not move.

Moveable Joints

Pivot – One bone rotates in a ring of a bone that does not move.

Ball-and-Socket – A rounded end that fits into a cuplike cavity.

Hinge – Has back and forth movement like a door.

Gliding – One part of a bone glides over another bone.

Skeletal System Injuries

1. Fracture – A break in a bone

2. Sprain – When ligaments stretch in a way they were not intended to

3. Dislocation – When two bones come apart in a joint

Fracture

Sprain

Dislocation

When there is a skeletal system injury…

• Stay calm and reassure victim• Call 911 or ask someone else to call as you care for victim• Make sure scene is safe before attempting to help victim• Get victims permission to help• Make victim comfortable• Give first aid if certified and you have the victims permission

RICE

•Rest – Stay off, don’t use•Ice – 15 min. on, 15 min. off•Compression – Wrap it up•Elevation – Higher than your heart (use gravity)