3.1 Classification of animals

• Biologie
• Middelbare school
• havo
• Leerjaar 1

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3.1 classification animal

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3.1 Classification of Animals

for class 1tto

How do you recognise vertebrates?

1. They have 4 legs.
2. They have scaley skin.
3. They have a backbone.
4. They live on land.

In taxonomy we use Kingdoms, Phyla and Classes. Which of these Phyla belongs to the Animal Kingdom?

1. Ferns
2. Mushrooms
3. Echinoderms
4. Cholera bacteria

Types of symmetry

• bilateral symmetry

1 line

• radial symmetry

More than 1 line

• Asymmetric

no lines

Which two types of symmetry do you see here?

Radially 
symmetrical

Bilaterally 
symmetrical

Phyla of the animal kingdom

• Sponges
• Cnidarians
• Molluscs
  
• Arthropods 
• Echinoderms
• Vertebrates 

1. Phylum: Sponges

Visible characeristics:

• no symmetry
• body has many holes (pores) for in-/outflow of water
• no mouth, no organs
• traps + eats plankton
• aquatic.

Sponges are aquatic animals.
Aquatic means that....

1. ...sponges live in water.
2. ...sponges are made of water.
3. ...sponges know how to swim.
4. ...a sponge can be used as a bath sponge.

2. Phylum: Cnidarians

Visible characteristics:

• An exoskeleton of Calcium, a coral
• the coral is built by Cnidarians
• Cnidarians show radial symmetry
• aquatic

Most Cnidarians show radial symmetry.
Which of the forms below shows
radial symmetry as well?

1. 
2. 
3. 
4. 

3. Worms

• long thin body
• 
  
• no skeleton (liquid)
• 
  
• bilateral symmetry 

What type of skeleton do worms have?

1. endoskeleton
2. exoskeleton
3. liquid skeleton

4. Phylum: Molluscs

Visible characteristics:

• some have an external skeleton: a shell
• soft bodies
• many are aquatic
• 
  

5. Phylum: Echinoderms

• ‘spiny skinned’
• aquatic
• radial symmetry (5 equal parts)
  
• endoskeleton
• with a mouth located in the center
    of the body.

=> sea star

Sponges

Cnidarians

Worms

Molluscs

Enchinoderms

Arthropods

Vertebrates

homework

exercise 1 +2 

exercise

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