Mollusks

Front 1

Name for outer layer of a mollusk shell

Back 1

Periostracum

Front 2

Structure used by filter feeding bivalves to bring in water containing small food particles

Back 2

Incurrent siphon

Front 3

The free swimming larva that emerges from the egg in many mollusk

Back 3

Trochophore

Front 4

The oldest and smallest whorl of a univalve shell

Back 4

Apex

Front 5

Process in which the visceral mass of a gastropod rotates 180 degrees during development

Back 5

Torsion

Front 6

Organs that remove metabolic waste from a mollusks body

Back 6

Nephridia

Front 7

Cephalopod means this

Back 7

Headfoot

Front 8

Material which composes the inner layer of a mollusks shell

Back 8

Nacre

Front 9

Type of circulatory system found in cephalopods

Back 9

Closed

Front 10

The term gastropod means this

Back 10

Stomachfoot

Front 11

Long , coiled organ used to absorb nutrients from digested food

Back 11

Intestine

Front 12

A copper containing pigment which causes mollusk to have a blue blood

Back 12

Nemccyanin

Front 13

The term bivalve means this

Back 13

Two shell

Front 14

Another name for the fore gut; receives and prepares food for digestion

Back 14

Buccalcavity

Front 15

Most mollusk have this symmetry

Back 15

Bilateral

Front 16

Part of the mollusk body that contains most of the organs

Back 16

Visceral mass

Front 17

Another term for mollusk shell

Back 17

Valve

Front 18

A protective plate made of tan protein that covers the shell aperture when the body is withdrawn into the shell

Back 18

Operculum

Front 19

The oldest part of the bivalve shell

Back 19

Umbo

Front 20

A membranous sheath of skin extending from the visceral mass that hangs down on each side of the body

Back 20

Mantle

Front 21

The second larval stage of many mollusks

Back 21

Veliger

Front 22

Another term for bivalves meaning hatchet-foot animals , after their shape

Back 22

Pelecypoda

Front 23

Material which composes the middle layer of a mollusks shell

Back 23

Calcium carbonate

Front 24

Animals found on rocky marine shorelines with 8 overlapping plates on their dorsal surface

Back 24

Chitons

Front 25

Modified gills present in many aquatic mollusk, feathery or comb liked structures used for respiration

Back 25

Ctenidia

Front 26

Name of middle layer of the mollusk shell

Back 26

Prismatic

Front 27

A rasping , tongue like organ

Back 27

Radula

Front 28

Strong muscles which extend between the shells to tightly hold a bivalve shell closed

Back 28

Adductor

Front 29

Structure that connects the two shells of bivalves

Back 29

Hinge

Front 30

The term mollusk means

Back 30

Soft

Front 31

The large , muscular organ mollusks use for locomotion and prey capture

Back 31

Foot

Front 32

Location of the eyes on a snail

Back 32

Tentacles

Front 33

Type of circulatory system in which blood is not entirely contained with blood vessels

Back 33

Open

Front 34

Nudibranchs , snails , and slugs are

Back 34

Gastropoda

Front 35

Squid , octopus , cuttlefish are

Back 35

Cephalopods

Front 36

Chitons are

Back 36

Polyplacophora

Front 37

Clams , oysters, scallops, and mussels are

Back 37

Bivalves

Front 38

A cephalopod is

Back 38

Intelligent with a well developed nervous system

Front 39

A gastropod

Back 39

Open circulatory system , external shells, use radula, have a pair of tentacles , use nephradia and undergo torsion

Front 40

A bivalve

Back 40

Has no distinctive head , open circulatory system, external shell, use gills, use nephridia, and are the most threatening groups of invertebrates in the unites states

Front 41

Chitons have

Back 41

An open circulatory system , external shells , use radula , their shell contains 8 overlapping plates , use nephridia

Front 42

Mollusk body is 3 main parts

Back 42

Head , foot , and visceral mass

Front 43

Most mollusk have well developed what ?

Back 43

Heads

Front 44

What range from rarely simple ones to the complex eyes or cephalopods

Back 44

Photosensory receptors

Front 45

What happens as the radula wear away

Back 45

New rows of teeth are continually replaced

Front 46

What surrounds the visceral mads

Back 46

The mantle

Front 47

The mantle cavity is what

Back 47

Space between the mantle and visceral mass

Front 48

The shell is contained of how many layers

Back 48

3

Front 49

The prismatic is the middle layer of the shell , the nacreous is the inner layer of the shell , what is the putter layer ?

Back 49

Periostacum

Front 50

What does the midgut contain

Back 50

The stomach and it’s used for sorting and crushing food

Front 51

Organs that remove metabolic waste from the animals body

Back 51

Nephridia

Front 52

Mollusks use what kind of reproduction

Back 52

Sexual

Front 53

Most are diecious

Back 53

🙃

Front 54

Polyplacophora means

Back 54

Many plate bearers

Front 55

Polyplacophora are all

Back 55

Marine

Front 56

The largest and most diverse class in phylum mollusca is

Back 56

Gastropoda

Front 57

How many gastropoda are their

Back 57

70,000 living and 15,000 fossil species

Front 58

Conus geographus means

Back 58

Geographic cone shell

Front 59

Conus geographus is the most what

Back 59

Venomous

Front 60

Teredo navalis means

Back 60

Naval shipworm

Front 61

Shipworms are nicknamed

Back 61

Termites of the sea

Front 62

What live in shipworms to help digest wood

Back 62

Symbiotic bacteria