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In/vertebrates Vocabulary
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vertebrates
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invertebrates
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Any animal that at some time in its life has a large nerve cord running down its back is known as
a(n)
chordate
All vertebrates have an internal skeleton, or ____, to support their bodies.
endoskeleton
The tip of your nose and the flaps of your ears are made of
cartilage
Four-footed vertebrates
tetrapods
All reptiles are _____, which means their blood can be cold or warm, depending on the
surroundings.
cold-blooded
Mammals and birds keep their body temperature constantly warm, which is why that are called
____ animals.
warm-blooded
Mammal milk is made in organs called __.
mammary glands
The animal kingdom is divided into two groups:
vertebrates and invertebrates
___ have backbones.
vertebrates
___ do not have backbones.
invertebrates
Most cnidarians use arm-like structures called __ to capture and sting the food they eat.
tentacles
Many __ live inside animals and plants.
roundworms
Mollusks such as clams and oysters are known as __ because their shells have two pieces.
bivalves
Arthropods have jointed limbs and an __, or outer skeleton.
exoskeleton