Phylum Mollusca Flashcards
1
Q
Type of symmetry
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A
Bilateral symmetry
2
Q
Classes and examples of mollusca
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A
1.gastropoda
Ex:slug & sea snails
2.bivalvia
Ex:scallops & oysters
3.cepholaopoda
Ex:squid & octopus
3
Q
Describe respiration
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A
- (aquatic) respire using gills located inside the mantle cavity
- (terrestrial) slugs and snails breathe using a mantle cavity
4
Q
Describe their reproduction
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A
- (aquatic) use external fertilization, releasing enormous amounts of sperm and eggs
- Cephalopods and some snails have internal fertilization within the female
- some Mollusca are hermaphrodites but only fertilize eggs of other individuals
5
Q
Describe circulation
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A
- Transport oxygen and nutrients around Mollusca’s body
- open system where blood isn’t always in vessels and pool in areas called sinuses
6
Q
Describe excretion
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- individual cells release waste into bloodstream
- structures called nephridia remove waste from bloodstream and release
7
Q
Nervous system
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A
Biunres very special system (include eyespots and chemoreceptors
Cophalopods have most developed nervous system of all invertabartes
8
Q
Digestion
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- herbivores,carnivores ,filter detrivores or parasites
- slugs and snails utilize a scraping structure
- calls and their relatives use a siphon to establish a current of water through body which filters food
9
Q
Meaning of the word mollusca
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A
Soft body
