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21 Cards in this Set

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  • Back
Mollusk are the the... and have ...... + species.
3rd largest phyla, and 50,000
What is the Visceral
Mass cavity=Internal organs
What is the mantle
layer of tissue which produces shell.
Diet of mollusks
size
Habitat
No parasites
mm to giant squid= archinteuthis >40 feet
aquatic, most tererestrial
Digestion, radula
toothed toughable
Style
grinding store embedded with diserine enzymes
gastric shield
surface the syle grinds against.
Circulatory of mollusks
open circular system except in october squid
blood with .... ...... which are
respiratory pigments which are protein with mental core which carries o2 in the blood.
Hemocoel
large control chamber where blood and most organs are located.
hemoglobie o2= no 02=

Hemo cyabub o2= no 02=
red,
purple-blue
green
clear
gill=
nerous=
ctendium
highly variable
clam osyter have

octopus squid
intelligence and eyes
ganglia- no real brain only touch

large brain- dog level or higher intelligence
large eyes with color vision
and human level or better vision
Reproductiion of mollusks
all oviparous
Trocophore larvae same as annelida
Classes of mollusks
polyplacophora=
Pelecypoda
Gastropoda=
Cephalopoda=
Chitons
aka Bivalaria = clam/oyster
Snail/snug
octopus/squid
polyplacophora=
shells=
slug liek body with an 8 part shell
valve
Pelecypoda
1)
2)
3)
4)
All aqutatic
99% species are filterfeeders, use gill as net
no head
no radula
Dorsal
abductor muscle
siphpons
Hinge ligament made of resilum, pulls shell open

pulls shell closed

to bring in h20 for respiration and filter feeding.
movemnt
99%
Scallops move by
Muscles
motile
crawl/burrow using foot
swimming by clapping stall
attach themselves to rock using byssal threads
Reproduction
all oviparous, seperate sexes. broadcast fertilizers
only in fresh water muscles of the family
Glochidia
microscopic baby muscles with toasted shell