Which are the main characteristics of animals?
They are heterotrophic, multicellular and composed of eukaryotic cells
What are the three vital functions that animals perform?
Nutrition, interaction and reproduction
Which are the main differences between invertebrates and vertebrates?
Vertebrates have a spinal column and invertebrates don't
Which types of invertebrates do you know?
Sponges, cnidarians, molluscs, annelids, arthropods and echinoderms
What type of nutrition do sponges have?
They are filter feeders, they use flagella to move water so that it passes through their pores and they can get nutrients from it.
Which types of body shape can cnidarians have?
They have two different body shapes: polyp and medusae
Which types of molluscs do you know?
Bivalves, gastropods and cephalopods
What's a radula?
A tongue with very small teeth for biting and chewing food
How do annelids breathe?
They have cutaneus respiration (they breathe through the skin)
What's an exoskeleton?
An external skeleton that protects the animal
Why do arthropods moult?
Because they need to shed their exoskeleton to continue growing
What's metamorphosis?
Is the process by which some species change how they look as they grow
Which are the 4 different groups of arthropods?
Myriapods, arachnids, insects and crustaceans
How do echinoderms move?
They have a system of ambulacra with small structures called tube feet
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