U4 B3 Joints

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

Which of these is NOT a function of the skeleton?

1. Giving shape
2. Make movement possible
3. Keeping organs in their spot
4. Protecting organs

What substance in a bone gives it rigidity?

1. Collagen
2. Callogen
3. Calcium phasphote
4. Calcium phosphate

What are fontanelles?

1. The bendable bones of a baby
2. The bendable bones in a baby's skull
3. The holes in between the skullbones of a baby
4. A special type of fountain

Bone tissue is strong and rigid. .... tissue is bendy. What word should be on the dots?

Immobile connections

• Fused 

Bones that have grown into 1 bone

• Sutures

Bones that are very close to each other

Moving connections

• Cartilage
  

Layer of cartilage in between bones

Small amount of movement

• Joint

Convex bone moves in concave bone

A joint

Ball-shaped bone

Socket bone

ligament

joint capsule

synovial fluid

cartilage

Keep the bones of the joint together

lets the bones move smoothly (lubricates)

stops wear and tear

Types of joints

• Ball-and-socket joint (moves in various directions)
• Hinge joint (Moves in 1 direction only)
• Pivot joint (Moves around axis of the other bone

Your elbow is a ..

1. Ball-and-socket joint
2. Hinge joint
3. Pivot joint

Your knee is a ..

1. Ball-and-socket joint
2. Hinge joint
3. Pivot joint

The arrow points to a ...

1. Ball-and-socket joint
2. Hinge joint
3. Pivot joint

The arrow points to a ...

1. Ball-and-socket joint
2. Hinge joint
3. Pivot joint

The shape of a bone is related to the function of the part of the body where that bone is located.
How do you see this in the forelegs of a mole and a bat?

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish