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Arthropoda
 The arthropods
Most successful animals on Earth…
Over 75% of all animals are arthropods!

Have bilateral symmetry with 3 tissue layers and
organs/systems
They have a true coelom type of body cavity
with a mouth and anus

They eat everything!

They reproduce sexually
These organisms live everywhere!
Diverse and
most successful
group of
invertebrates

The body is
divided into 2
or 3 sections
They have
compound
eyes!!!
They undergo metamorphosis
Has a nervous system with brain and nerve
cords

Has an open-circulatory system with heart and
arteries but no veins
Named for their jointed appendages

Hard exoskeleton for protection; most must
molt to grow

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Arthropoda & echinodermata notes