An invertebrate with a soft un-segmented
body often enclosed in a hard shell containing
calcium carbonate; examples include snails,
clams,& squids
MOLLUSK
Free swimming, ciliated larva seen in mollusks
and some annelids
TROCHOPHORE
The epidermal layer (outside surface) of
mollusks; In a clam, it makes the shell
MANTLE
A rough, flexible tongue-like strip covered
with tough, abrasive teeth used in feeding
by most mollusks except bivalves
A aquatic mollusk with a shell divided into two
halves connected by a hinge, such as a clam
oyster, or scallop
BIVALVE
In a mollusk the body region, located between
the head-foot and the mantle, that contains
the heart, digestive, excretory, & reproductive
organs
VISCERAL MASS
A space between the mantle and the visceral
mass in mollusks (In a clam, it’s the space seen
when the shell is opened)
MANTLE CAVITY
A mass of nerve cells is called a _________
GANGLION (pl. GANGLIA)
RADULA
Process during larval development of gastropods
in which the visceral mass twists 180° so the
tail ends up in towards the front of the body
near the head
TORSION
What do we call circulatory fluid (blood) in an
animal with an open circulatory system
What do we call the fluid filled body cavity
or space in an invertebrate with an open
circulatory system
The tube through which water ENTERS the
mantle cavity of a bivalve = ?
HEMOCOEL
HEMOLYMPH
INCURRENT SIPHON
A tube through which water EXITS the mantle
cavity of a bivalve
In animals, a respiratory organ specialized
for the exchange of gases with water
EXCURRENT SIPHON
Name the fan-like structures at the anterior
end of a clam that move food trapped on the gills
forward and into the mouth
GILL
Name the muscles used by a bivalve to open and
close its shell
PALPS
ADDUCTOR MUSCLE
Name the pigment cells located in the outer
mantle in cephalopods that can produce a sudden
color change for camouflage
A free swimming, predatory mollusk with a
circle of tentacles extending from the head
such as an octopus, squid, cuttlefish or a
chambered nautilus
CHROMATOPHORES
A mollusk that has one or no shell and moves
by gliding on a muscular foot such as a snail,
slug, and nudibranch
GASTROPOD
Mollusks are ______________
Invertebrate protostomes
Invertebrate deuterostomes
Vertebrate deuterostomes
Name the excretory organ found in clams
KIDNEY
CEPHALOPOD
Clams have ______________ development
DIRECT
INDIRECT
Bivalves and gastropods have _______
circulation.
OPEN
CLOSED
To which body system do kidneys belong?
EXCRETORY
Give the function for kidneys.
This word describes organisms that stay in one
place and don’t move much
Collect & remove nitrogen waste;
osmoregulation
Cephalopods have ________ circulation
OPEN
The name MOLLUSK comes from the Latin word
meaning ____________
CLOSED
All aquatic mollusks except cephalopods
have ____________ development.
DIRECT
SESSILE
INDIRECT
The name BIVALVIA comes from the Latin
words meaning ________________
TWO SHELLS
SALT
All clams ______________
have separate sexes
The mollusks with the most advanced brain
are the _____________
BIVALVES
are hermaphrodites
GASTROPODS
CEPHALOPODS
Mollusks have a(n) ________________
acoelom
Marine clams live in _____________ water.
FRESH
SOFT
pseudocoelom
eucoelom
Bivalves have ___________ symmetry
no
radial
bilateral
An organism that has both male and female
reproductive organs is called a(n) _______
HERMAPHRODITE
Mollusk group in which most organisms have
1 SHELL
GASTROPODS
Mollusk group in which most organisms have
NO SHELL
CEPHALOPODS
Name the KINGDOM for clams.
ANIMALIA
Name the CLASS for clams.
BIVALVIA
TRUE OR FALSE:
The space seen when you open a clam’s
shell is its coelom.
Mollusk group in which organisms have
2 SHELLS
BIVALVIA (BIVALVES)
Name the only group of mollusks that does
NOT have cephalization
BIVALVES
Name the PHYLUM for clams.
MOLLUSCA (MOLLUSKS)
Give the KINGDOM, PHYLUM, & CLASS
for clams.
Kingdom: Animalia; Phylum: Mollusca; Class: Bivalvia
The space surrounding the heart in a clam is
called the ______________ space.
PERICARDIAL CAVITY (COELOM)
FALSE: it’s the mantle cavit.;
the coelom is the pericardial cavity
Mollusks have a________________
Tell the all purpose word for reproductive
organs
Ventral nerve cords/dorsal heart
GONADS
Dorsal nerve cords/ventral heart
Organisms that strain food out of water
are called ______________ feeders
FILTER
digestive, excretory, reproductive
Give TWO functions for gills in a clam.
GAS EXCHANGE & TRAP FOOD
The umbo on a clam’s shell is located closer
to the ___________ end.
ANTERIOR
POSTERIOR
Bile works to help break down _______
carbohydrates
fats
proteins
Which part in a clam collects and removes
digestive waste?
INTESTINE
Name the muscular part of a clams body
used for locomotion
FOOT
Name the THREE body systems that used the
mantle cavity as an EXIT.
The bump on a clams shell is called the _____
UMBO
The part in a clam that makes bile is the ?
DIGESTIVE GLAND
Which body part in a clam finishes digestion
and absorbs nutrients?
DIGESTIVE GLAND
Name the exit opening for digestive waste.
ANUS
Name the part that starts digestion and grinds
up food.
STOMACH
To which body system does the heart
belong?
To which body system does the intestine
belong?
CIRCULATORY
To which body system do gonads belong?
REPRODUCTIVE
Give a function for the heart?
PUMP BLOOD
Name the substance is produced by the
digestive gland that helps break down
fats
BILE
Name the chemical that makes clam shells
hard.
CALCIUM CARBONATE
To which body system do ganglia belong?
NERVOUS
DIGESTIVE
To which body system does the gills
belong?
RESPIRATORY
Give a function for the intestines in a clam
collect/remove digest waste
Name the muscles that control the opening and
closing of the clam’s shell
ADDUCTOR MUSCLES
Tell the number of ganglia and nerve cords
found in a clam.
3 pairs of ganglia; 2 pairs of nerve cords
Which part in a clam traps food?
GILLS
Tell one way clams are different from earthworms.
Earthworms: closed circulation; direct development;
cerebral ganglia & 1 nerve cord;hermaphrodites;
breath through skin; nephridia; cephalization
Clams: open circulation; indirect development;
multiple ganglia/nerve cords; separate sexes;
breathe with gills; kidneys; no cephalization
Tell one way clams are different from earthworms.
Earthworms: closed circulation; direct development;
cerebral ganglia & 1 nerve cord;hermaphrodites;
breath through skin; nephridia; cephalization
Clams: open circulation; indirect development;
multiple ganglia/nerve cords; separate sexes;
breathe with gills; kidneys; no cephalization
Tell one way clams and earthworms are alike.
Both: invertebrate protostomes; eucolom;
Sexual reproduction; ventral nerve/dorsal heart
2 opening digestive system
Tell one way clams and earthworms are alike.
Both: invertebrate protostomes; eucolom;
Sexual reproduction; ventral nerve/dorsal heart
2 opening digestive system