arthropods and echinoderms 2011
TRANSCRIPT
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* Echinoderms are __________, ________, __________, ________, ____________, and _____________.
* Echinoderm means _______________. All echinoderms have spiny skin.
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•There are ______ characteristics of echinoderms.
•All echinoderms have:
• Spiny skin
• An internal skeleton
• A five part body
• A water vascular system
• Tube feet
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* The internal skeleton of an echinoderm is made of _______________________.
* The water vascular system also helps an echinoderm _____.
* An echinoderm’s water vascular system is _________________________________.
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* Echinoderms have __________.
* An echinoderm’s tube feet are used for _________________________________.
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* A starfish uses its tube feet to move and
to open its food.
* A starfish is able to re-grow its arms.
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* Sea urchins have longer and sharper ________ that they use to protect themselves.
* Some sea urchins have ________ spines.
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* Sea urchins have a mouth hidden under its body.
* A sea urchin uses its five teeth to eat ____________.
* A sea urchin is not very active. Sometimes, it does move slowly using its __________. When not moving it uses its feet to stick to the ocean floor.
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An arthropod is an invertebrate with an exoskeleton, a segmented body,
and jointed legs.
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There are more than 1 million kinds of
arthropods on Earth.
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An exoskeleton is a hard, outer covering.
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Molting is to leave an exoskeleton and grow a new one.
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A crustacean is an arthropod that has a hard,
exoskeleton, two pairs of antennae, and a
mouth for crunching and grinding.
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Crustaceans can ________ certain parts of their body.
Most crustaceans live in ______ and get oxygen from the water through _________.
Gills are
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Figure 7.36