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Science

Science Terms
Across
Gives the embryo a rich supply of food
Most fishes also have a ________
Is the tough material of your nose
Dinosaurs are known as prehistoric _______
Means "double life"
Fish are _______
Most fish also have a _______ system
The union of sex cells outside the bodies if the parents
Mammals are ______ animals
Filled with fluid
Vertebrate belong to the phylum
They are sometimes called cold blooded animals
Down
Vertebrates belong to the phylum _______
An animal that has a backbone
Takes oxygen from the air and delivers oxygen to the blood
An animal that has a backbone
Also known as a gas bladder
Sharks belong to a class of fish called _______
They are sometimes called cold blooded animals
An egg that hold fluid that protects the embryo