3.1 Bones, nothing but bones

Chapter 3
Skeletons
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Chapter 3
Skeletons

Slide 1 - Diapositive

Some characteristics
Endo - on the inside, grows easily, normal weight.
Exo - on the outside, cannot grow, very heavy
Hydro - on the outside, grows easily, filled with water, very light (sort of skin)
3 skeletons: Endo - Exo - Hydro - skeleton

Slide 2 - Diapositive

Slide 3 - Vidéo

What kind of skeleton does this golden jewel beetle have?
A
Endoskeleton
B
Exoskeleton
C
Hydrostatic skeleton
D
Just its skin

Slide 4 - Quiz

What kind of skeleton does this blue caterpillar have?
A
Endoskeleton
B
Exoskeleton
C
Hydrostatic skeleton
D
Just its skin

Slide 5 - Quiz

What kind of skeleton does this betta fish have?
A
Endoskeleton
B
Exoskeleton
C
Hydrostatic skeleton
D
Just its skin

Slide 6 - Quiz

Animals with an exoskeleton can
A
not grow
B
grow
C
only grow when they moult
D
only grow once

Slide 7 - Quiz

Animals with an endoskeleton have muscles outside/inside their bones.
A
outside
B
inside

Slide 8 - Quiz

Animals with an exoskeleton have muscles outside/inside their skeleton
A
outside
B
inside

Slide 9 - Quiz

All skeletons have their own weight. What is the correct order from heavy to light?
A
exo - hydro - endo
B
exo - endo - hydro
C
endo - exo - hydro
D
hydro - endo - exo

Slide 10 - Quiz

Slide 11 - Diapositive

Slide 12 - Diapositive

Slide 13 - Diapositive

Evolution completely
Just the skeleton (from E to A)

Slide 14 - Diapositive

Why do we have a skeleton?
  • It helps you move
  • It protects your organs
  • It gives you shape and strength
  • It produces blood cells

Slide 15 - Diapositive

And humans?
We have an endoskeleton, that contains 4 parts:
  • Skull protects the brain
  • Backbone (or spine) carries the weight and protects the spinal cord 
  • Rib cage protects lungs and heart
  • Limbs for locomotion (walking)
Spinal cord: consists of nerve tissue, so has to be protected. If the nerve tissue damages, you can't walk anymore

Slide 16 - Diapositive

Slide 17 - Diapositive

Read section 3.1
Do the exercises 1 up to and 6 from 3.1

Slide 18 - Diapositive