3.6 Echinoderms

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

FLATWORMS

SEGMENTED WORMS

ROUNDWORMS

Most simple body plan

Live in water

Absorb nutrients through their skin

Live in soil and poo

Have a smooth & round body

Also called ringworm

Some are parasitic

Live in and eat soil

Their body is made up of ring-like structures

Some are parasitic

What type of worm is this?

1. Flatworm
2. Segmented worm
3. Roundworm
4. You cannot see that in this picture

A snake is a mollusc

1. Right
2. Wrong

What type of worm is this?

1. Flatworm
2. Segmented worm
3. Roundworm
4. You cannot see that in this picture

What type of worm is this?

1. Flatworm
2. Segmented worm
3. Roundworm
4. You cannot see that in this picture

Which of the following animals is NOT a mollusc?

1. Octopus
2. Snail
3. Starfish
4. Mussel

What have you learnt about molluscs?

Echinoderms .. 

... have spiky skin 

.. are invertebrates, although they do have stiff plates under their skin for support. 

... are aquatic.

... have radial symmetry

... have tube feet to move with

... can be carnivores, herbivores or omnivores