Unit 4: Support and locomotion B3

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Planning

• See what you remember from the last lesson
• Basic 3: Joints

Learning goals

*You can describe the types of joints.

*You can describe the structure of a joint.

*You can describe how a ball-and-socket joint, a hinge joint and a pivot joint work

But first.. what do you remember?

Do you remember what the 4 functions are of the skeleton?

What do bones exist of?

1. collagen
2. cartilage
3. calcium phosphate and cartilage
4. calcium phosphate and collagen

Bones consist of calcium phosphate and collagen.

Why is it important that bones have both of the substances?

in which figure do you see cartilage?

fig. 1

fig. 2

what does the extracellular material of cartilage mainly consist of?

1. calcium phosphate
2. Collagen

Different kind of connections

Immobile connections

1. fused together (vergroeid)

2. sutures (naadverbinding)

No movement is possible between fused bones or between bones attached by a suture.

mobile connections

1. Cartilage 

2. joints

The cartilage and the joints allow the ribcage to expand and contract as you breathe.

Structure of a joint

A joint is a connection between two bones.

Convex bone & concave bone

The cartilage lets the bones move smoothly and stops wear and tear.

The joint capsule keeps the bones together

The ligaments keep bones in place.

Synovial fluid lets the bones move smoothly

Types of joints

1.ball-and-socket joint

2. pivot joint

3. hinge joints

Homework

Unit 4: Support and locomotion

B3 Joints: exercise 1,2,3,5