2.6 skeleton and lifestyle

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

2.6 Skeleton and lifestyle

Learning objectives

• You will learn how an animal’s skeleton is adapted to its lifestyle and how animals are able to move in water and on land.
• You will learn about the strength and movement of invertebrates.

Same body structure

Different lifestyle

Which characteristic of the mole makes him suitable for a life underground?

1. He can't see very well
2. He has a good smell
3. He has big paws

Same body structure, different lifestyles

Movement

In water; fish have vertical tails, mammals horizontal
- streamlined body

On land; reptiles have legs next to their bodies, mammals right under their bodies

How do vertebrates move?

How do vertebrates move?

1. Backbone moves back and forth
   
   - Fish
   - Amphibians
   - Reptiles

How do vertebrates move?

1. Spine moves back and forth
   
   - Fish
   - Amphibians
   - Reptiles

Hoe bewegen dieren met een wervelkolom?

1. Backbone moves back and forth
- Fish
- Amphibians

- Reptiles

2. Backbone moves up and down

- Birds

- Mammals

Invertebrates

Sturdy due to external skeleton
e.g. calcareous skeleton (shellfish)
or armor of chitin (e.g. insects)

How does a grasshopper move?

How does an earthworm move?

What?	Make: 2.6 assignment. 3 t/m 9, 11, 14 t/m 18, 21, 22
How?	In your workbook
Help?	Raise your hand or ask your neigbour!
Time?	15 minutes
Finished?	Check your answers and make test yourself.
	Now you know everything for the big test.