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10 Cards in this Set
- Front
- Back
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What charactertistic is unique to chordates?
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notochord
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The amphibians have an _____ egg.
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amniotic egg
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The main source of heat for ectotherms is ____________.
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the environment
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A characteristic of endotherms is that they generate heat from ______
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within their own body.
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Aquatic chordates such as tunicates, fishes and amphibian larvae typically breathe
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through gills
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Most chordates that use gills for respiration have a __ ___ circulatory system.
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single loop
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An excretory organ composed of small tubes that filter waste from the blood is the _____.
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kidneys
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The thinking region of the chordate brain is the _____.
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cerebrum
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Most vertebrates have a ____ backbone.
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flexible
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What are the major excretory organs in vertebrates?
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kidneys
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