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22 Cards in this Set
- Front
- Back
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Phylum of Nereis worm |
Annelida |
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Class of Nereis worm |
Polychaeta (many bristles) |
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Branched parapodia |
Biramous |
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Process of preparing worms for sexual maturity |
Epitoky |
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Name of segments |
Metameres |
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What separates segments |
Annuli |
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Function of denticles |
Grind food in the pharynx |
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How they breathe |
Gas exchange through the parapodia, which also function as gills |
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How blood flows |
Ventral blood vessel ---> Capillaries in the parapodia ---> Dorsal blood vessel
No heart.pumping mechanism |
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Function of setae |
Sensors |
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Type of cleavage in protostome development |
Spiral Determinate |
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Type of coelom formation in protostome development |
Solid masses of mesoderm split and form coelom |
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Type of blastopore formation in protostome development |
Mouth develops from blastopore |
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Crayfish and Nereis are both... (type of coelom) |
Coelomates |
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Coelomates |
Coelom derives from mesoderm |
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Type of symmetry of crayfish |
Bilateral |
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Dorsal |
Back |
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Ventral |
Bottom |
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Anterior |
Toward front/head |
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Posterior |
Towards anus/tail |
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Ecdysozoa |
Crayfish Known for molting or shedding their exoskeleton |
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Lophotrochozoa |
Nereis worm Have trochophore larva that use cilia to swim and eat |
