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

Welke vervanging van de mol maakt hem geschikt voor het leven in gangen?

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.