3.1.11 Skeletal system3.1.11 Skeletal system

• We will learn about the skeletal system by We will learn about the skeletal system by taking notes and doing a mini labtaking notes and doing a mini lab

• TEK 7.12 B TEK 7.12 B • Warm up: George needs to go 6 miles in 30 Warm up: George needs to go 6 miles in 30

minutes. How fast must he travel in miles per minutes. How fast must he travel in miles per hour? hour?

Skeletal System NotesSkeletal System Notes

Functions: 1.1.Provide a framework for shapeProvide a framework for shape2.2.Support and movementSupport and movement3.3.Protects vital organsProtects vital organs4.4.Stores minerals (calcium and phosphate)Stores minerals (calcium and phosphate)5.5.Produces red blood cells within the marrow Produces red blood cells within the marrow

of long bonesof long bones

Skeletal system Skeletal system

• As a baby most of your 206 bones were made As a baby most of your 206 bones were made up of flexible up of flexible cartilage

• As you grow up your bones become As you grow up your bones become ossified oror hardened by minerals such as hardened by minerals such as calcium

• As an adult As an adult cartilage is is found at the ends of found at the ends of the bone and serves as the bone and serves as a shock absorber for a shock absorber for jointjoint

• A joint is where two bones meetis where two bones meet• Connective tissues that holds bones together Connective tissues that holds bones together

are called are called ligaments

Do you have a spine?

• Vertebrates have a have a backbonebackbone

• Invertebrate do NOT have a do NOT have a

back boneback bone

Inside or Outside?

• Exoskeleton- animals that animals that have external have external skeletonsskeletons

• Endoskeleton- the skeleton is the skeleton is on the insideon the inside

Joint Type Location of joint Type of movement

Fixed Cranium None

Pivot Between vertebrae

Slight rotation

Ball and socket

Shoulder and hip wide range, circular motion

Hinge Elbows, knees, fingers

Back and forth

Gliding Wrist and ankle bones

sliding

Joint Lab• Different joints allow certain types of Different joints allow certain types of

movements and different range of motion. movements and different range of motion. • Go to each station and observe your partner Go to each station and observe your partner

perform the activity. perform the activity. • Discuss with your partner what type of joints Discuss with your partner what type of joints

were used and record it in your chartwere used and record it in your chart

Activity Name Type of joint(s)

Analyze it! Analyze it!

1.1. Which types of movement required more than Which types of movement required more than one type of joint? one type of joint?

2.2. Why do most types of movement require many Why do most types of movement require many joints working togetherjoints working together

3.3. Which type of movement require many joints Which type of movement require many joints working together? working together?

4.4. Name two other movements that require the Name two other movements that require the use of hinge jointsuse of hinge joints

5.5. Which type of joint was not mentioned as a Which type of joint was not mentioned as a moveable joint in this activity? moveable joint in this activity?

• Recall: the skeletal system is made up of bones, cartilage and ligaments

• Summary: Where can you find red blood cell production? (use complete sentence)

• OUT: Describe the 4 main functions of the skeletal system.