Select all that applyIf you wanted to find an animal from a phylum that commonly exemplifies an open circulatory system, you would select a/anMultiple select question.arthropod.non-cephalopod mollusk.chordate.cephalopod mollusk.cnidarian.
Question
Select all that applyIf you wanted to find an animal from a phylum that commonly exemplifies an open circulatory system, you would select a/anMultiple select question.arthropod.non-cephalopod mollusk.chordate.cephalopod mollusk.cnidarian.
Solution
The correct answers are:
- Arthropod
- Non-cephalopod mollusk
Explanation:
An open circulatory system is one in which blood is not entirely contained within blood vessels and flows freely in the body cavity.
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Arthropods, which include insects, spiders, and crustaceans, commonly have an open circulatory system.
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Non-cephalopod mollusks, like snails and clams, also have an open circulatory system.
On the other hand,
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Chordates (which include all vertebrates) have a closed circulatory system, where blood is contained within blood vessels.
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Cephalopod mollusks, like octopuses and squids, are unique among mollusks because they have a closed circulatory system.
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Cnidarians, such as jellyfish and sea anemones, have a more primitive tissue-level organization and do not have a circulatory system.
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