Invert Exam 3 Vocab

Front 1

Periostracum

Back 1

Top layer of mollusc shell

Front 2

Prismatic Layer

Back 2

Second layer of mollusc shell

Front 3

Nacreous layer

Back 3

Inside layer of mollusc shell

Front 4

Mantle

Back 4

the dorsal body wall which covers the organs of digestion, reproduction and movement

Front 5

Nacre

Back 5

mother of pearl

Front 6

Osphradium

Back 6

test incoming water for silt and possible food particles

Front 7

Ctenidia

Back 7

a comblike structure, especially a respiratory organ or gill in a mollusk, consisting of an axis with a row of projecting filaments.

Front 8

Hemocoel

Back 8

the primary body cavity of most invertebrates, containing circulatory fluid

Front 9

Radula

Back 9

Mouth

Front 10

Metanephridia

Back 10

excretory gland

Front 11

Nephridiophore

Back 11

the external opening

Front 12

Trochophore

Back 12

Larvae stage having a roughly spherical body, a band of cilia, and a spinning motion

Front 13

Velum

Back 13

a membrane, typically bordering a cavity

Front 14

Operculum

Back 14

shield used to plug entrance of shell

Front 15

Detorsion

Back 15

less torsion

Front 16

Siphon

Back 16

tube used to get food and water when shell is closed

Front 17

Cerata

Back 17

used for gas exchange, hair-like, may contain nematocysts

Front 18

Rhinophores

Back 18

chemosensory, analogous to osphradium

Front 19

Parapodia

Back 19

a lateral extension of the foot used as an undulating fin for swimming

Front 20

Kleptoplasty

Back 20

stealing plastids; algal genes are incorporated into sea slug DNA

Front 21

"Love Darts"

Back 21

made of chitia or calcium carbonate

Front 22

Hectocotylus

Back 22

modified arm used to transfer spermatophore to female

Front 23

semelparous

Back 23

when cephalopods die after reproduction

Front 24

Chromatophores

Back 24

a cell or plastid that contains pigment

Front 25

Septa

Back 25

a wall, dividing a cavity or structure into smaller ones

Front 26

Siphuncle

Back 26

transports liquid/gases through chambers

Front 27

Cephalopod defenses

Back 27

1. Camouflage

2. Minicry

3. Bright Patterns

4. Bioluminescence

5. Ink

6. Autotomy

7. Construct a shelter

Front 28

Camouflage

Back 28

chromatophores on top layer of reflective cells

Papillae can change texture

Front 29

Mimicry

Back 29

Look and act like another animal

Front 30

Bright patterns

Back 30

aposematic (warn predators hat you're toxic) and deimatic (startling coloration) colorations

Front 31

Bioluminescense

Back 31

produced by photophores or bacteria

used to lure in prey, communication, and courtship

Front 32

Ink

Back 32

ink sac is in digestive system, discharges through anus

Confuses predators

Front 33

Autotomy

Back 33

drop arm to escape predation

Front 34

Construct a shelter

Back 34

the veined octopus will carry around shells to later use as shelter

Front 35

Cuttlebone

Back 35

used for buoyancy regulation

Front 36

Pen

Back 36

stick of chitin and proteins

Front 37

Adductor muscles

Back 37

a muscle whose contraction moves a limb or other part of the body toward the midline of the body or toward another part

Front 38

Incurrent siphon

Back 38

takes in water

Front 39

Excurrent siphon

Back 39

lets out water

Front 40

Byssal threads

Back 40

strands of protein used to attach to things like a rock

Front 41

Glochidia

Back 41

toxin released to parasitize fish

Front 42

Infauna

Back 42

burrow into substrate

Front 43

Setae

Back 43

a stiff hairlike or bristlelike structure

Front 44

Metamerism

Back 44

segmented body

Front 45

Metanephridia

Back 45

circulatory system

Front 46

Epitoky

Back 46

reproduction event where all epitokes come to the surface and have a mass birth

Front 47

Peristaltic waves

Back 47

contractive movement done by worms

Front 48

Spermathecae

Back 48

a receptacle in which sperm is stored after mating

Front 49

Lophophore

Back 49

feeding appendage

Front 50

Ecdysis

Back 50

Molt

Front 51

Tagmatization

Back 51

Fused segments

Front 52

Epicuticle

Back 52

the thin, waxy, protective outer layer covering the surfaces of some plants, fungi, insects, and other arthropods

Front 53

Procuticle

Back 53

a thick, inner, chitin–protein layer

Front 54

Ostia

Back 54

pores in the heart that pulls blood in from body

Front 55

Ocelli

Back 55

another term for simple eye

Front 56

Ommatidium

Back 56

each of the optical units that make up a compound eye

Front 57

Cephalon

Back 57

head section of an arthropod

Front 58

Thorax

Back 58

middle section of an arthropod

Front 59

Pygidium

Back 59

the terminal part or hind segment of the body

Front 60

Prosoma

Back 60

Head and thorax regions together in one

Front 61

Opisthosoma

Back 61

Abdomen

Front 62

Chelicerae

Back 62

either of a pair of appendages in front of the mouth in arachnids and some other arthropods, usually modified as pincerlike claws.

Front 63

Pedipalps

Back 63

each of the second pair of appendages attached to the cephalothorax of most arachnids

Front 64

Gnathobase

Back 64

a joint or process of the proximal part of the appendage of an arthropod modified to aid in carrying or masticating food

Front 65

Ovigers

Back 65

used to groom other legs and holds females eggs after reproduction

Front 66

Spinnerets

Back 66

any of a number of different organs through which the silk, gossamer, or thread of spiders, silkworms, and certain other insects is produced

Front 67

Phoretic

Back 67

hitchhike on other organisms