Phylum Platyhelminthes
Phylum Platyhelminthes
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What does Platyhelminthes mean?
Flatworms.
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What type of digestive cavity do Platyhelminthes have?
Gastrovascular cavity.
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Examples of Platyhelminthes?
Planaria, liver flukes, tapeworms.
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How many digestive openings?
Only 1.
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Flatworm symmetry?
Bilateral symmetry, a body plan where the animal can be divided into two equal left and right halves.
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Do flatworms have respiratory organs?
No.
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Flatworms are diploblast or triploblast?
Triploblast, (an animal that develops from three tissue layers: outer, middle, and inner layers.)
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What is Planaria?
Free-living flatworm in freshwater.
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Flatworms are coelomate or acoelomate?
Acoelomate, animal with no body cavity between the body wall and gut.
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Planaria class?
Turbellaria class.
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What is Coelomate?
an animal with a true body cavity called a coelom between the body wall and gut.
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Planaria eyespots detect what?
The eyespots (ocelli) detect light.
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What is Acoelomate?
An animal with no body cavity (coelom) between the body wall and gut.
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Planaria auricles detect what?
auricles (ears) ---> It detects chemicals and water movement.
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Where is Planaria’s mouth?
Ventral middle (underside/middle of its body).
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What is the scolex?
Tapeworm head, helps the tapeworm attach to the host’s intestine using suckers, hooks, or grooves.
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What are proglottids?
The repeating body sections of a tapeworm (it contains reproductive organs and can hold eggs.