4.2 Skeleton + posture

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

Jellyfish, sponges and some types of worms have a ... skeleton

A skeleton that is found on the inside of the body is called an ...

Which of the following characteristics does not belong to an exoskeleton?

1. Found on the outside of the body
2. Animal needs to moult to grow
3. Made of chitin
4. Only found in water animals

Which of the following characteristics does not belong to an endoskeleton?

1. Made of living cells
2. Can grow and repair itself
3. Made of chitin
4. Found in vertebrates

Unit 4 Jointed skeletons

4.2 skeleton &  posture

The skeleton of an adult human consists of approximately...?

1. 500 bones
2. 206 bones
3. 350 bones
4. 150 bones

Why do we have a skeleton?

objective

names of the bones

what' s a good posture

4.2 Your skeleton & posture

The skull protects the brain.

The backbone/spine protects the spinal cord.

The rib cage protects the lungs and the heart.

The limbs are used for locomotion.

De wervelkolom beschermt het ruggenmerg .

ulna (red)

radius (rotates around the ulna)

vertebrae

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         Intervertebral discs - made of                                                                                                               cartilage

SPINE / BACKBONE

• Double-S-shape
• cartilage protects the spinal cord

homework

the assignments of 4.2 except the practicals and talking points.

ACTIVITY

• Read the blue box on page 94. 
• Improve each others posture in English!