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Living things
Invertebrate groups
Most animals on Earth are invertebrates. There are many different groups of invertebrates. Some
invertebrates, such as jellyfish, live in water. Others, such as earthworms, live on land. Some, such as
mosquitoes, can fly. Here are three groups of invertebrates:
Molluscs
Molluscs
have a soft,
muscular body
. Many molluscs live in the sea. Mussels and oysters are molluscs.
1
Read and find out:
a)
where invertebrates
c)
what’s special about
live
arthropods
b)
what’s special
d)
what’s special about
about molluscs
worms.
R E A D & T H I N K
How are we
different to
invertebrate
animals?
Arthropods
The biggest group of invertebrates are the
arthropods
. Their bodies have three parts:
the head,
thorax
and
abdomen
. Many of them
have
antennae
and some have wings too. Insects
(beetles and bees) are arthropods. Spiders and
scorpions are arthropods too. Some arthropods,
such as insects, have six legs. Others, such as
spiders, have eight legs. There are even
arthropods with more than a hundred legs!
Snails are molluscs.
Octopuses are molluscs.
An ant is an arthropod.
