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Marine Biology > Chp.9 > Flashcards

Chp.9 Flashcards

1
Q

Molluscan body plan consists of two major parts

A

head-foot and visceral mass

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2
Q

Head-foot

A

Part of body that contains mouth with its sensory organs and a foot

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3
Q

Dorsal visceral mass

A

contains other organ systems

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4
Q

Mantle

A

tissue found in molluscs responsible for forming shell, locomotion and gas exchange

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5
Q

Radula

A

Ribbon of tissue that contains teeth

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6
Q

Chittons

A

Flattened body covered by eight shell plates

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7
Q

Tusk Shells

A

Open shell with foot protruding from larger opening, water enters and exits through smaller opening bury themselves in sediments with foot

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8
Q

Univalve

A

shell composed of a single piece

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9
Q

Whorl

A

Turn of a gastropod shell around a central axis

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10
Q

Aperature

A

Opening to gastropod shell

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11
Q

operculum

A

Structure gastropods have for closing their aperature

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12
Q

Bulb gland

A

gland located near the mouth of cone snails that produce venom

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13
Q

Deposit feeders

A

animals that feed on organic material that mixes with mineral deposits

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14
Q

Nudibranchs

A

Marine gastropods that lack a shell

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15
Q

Cerata

A

prjections found on nudibranchs that increase the surface area available for gas exchnge

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16
Q

Bivalves

A

Molluscs that have two hinged shells covering their body

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17
Q

Umbo

A

Area around hinge, oldest part of shell

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18
Q

Adductor muscles

A

Closes the two valves of molluscs, wen relaxed they open

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19
Q

Palps

A

structure near bivalves mouth that form food mass and move to mouth

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20
Q

Byssal Thread

A

tough threads composed of protein (how Mussels attach)

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21
Q

Cephalopods

A

octopus and squid (“head”“footed”) foot modified into head like structure

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22
Q

Siphuncle

A

cord tissue that runs through the chambers of a nautiloid and removes seawater from new chambers as they form

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23
Q

Chromatophores

A

pigment containing cells that function in color changes (Cephalopods)

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24
Q

Spermatophore

A

package of sperm

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25
Q

Oviduct

A

tube that carries eggs to outside of body

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26
Q

Supporting an animals body using fluid contained in the body

A

Hydrostatic skeleton

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27
Q

Small bristles in the skin of some annelids

A

Setae; locomotion, digging, anchorage and defense

28
Q

Polychaetes that are active movers

A

Errant Polychaetes

29
Q

Sessile polychaetes

A

Sedentry Polychaetes

30
Q

Animals that ingest both organic and mineral particles and then digest organic material

A

Nonselective deposit feeders

31
Q

masses of organic material and mineral particles that are defecated by deposit feeders

A

Casting or fecal casts

32
Q

Animals that seperate organic material from minerals and then ingest only the organic material

A

Selective Deposit Feeders

33
Q

Type of reproduction in some polychaetes that involves the production of a reproductive individual that is adapted for a free swimming existance

A

Epitoky

34
Q

Behaviour that bring sexually mature individuals together

A

Swarming

35
Q

Chemical releases by female epitokes that stimulate males to shed sperm

A

Fertilizin

36
Q

solitary nonsegmented worms

A

Sipunculids

37
Q

animals with jointed appendages

A

Arthropods

38
Q

hard exterior skeleton

A

Exoskeleton

39
Q

Tough polysacharide found in the exoskeltons of Arthropods

A

Chitin

40
Q

Process where Arthropods shed old exoskeleton and form a new one

A

Molting

41
Q

Appendages found in Chelicerates that are modified for feeding

A

Chelicera

42
Q

Body region composed of a fused head and thorax

A

Cephalothorax

43
Q

body region of an animal that corresponds to the belly

A

Abdomen

44
Q

Long spike used by horseshoe crab for steering and defense

A

Telson

45
Q

Sensory sstructures of arthropods

A

Palps

46
Q

Arthropods that have appendages called mandibles fro chewing food

A

Mandibulates

47
Q

Arthropod appendages modified for swimming

A

Swimmerets

48
Q

Claws are

A

Chelipeds

49
Q

Anterior pair of appendages in male decapods which are adapted for delivering spermatophores to females

A

Copulatory pleopods

50
Q

Planktonic larval stage of some crabs and mantis shrimp

A

Zoea

51
Q

Planktonic larval stage of some shrimp and barnacles

A

Nauplius

52
Q

Bioluminescent organs found in krill

A

Photophores

53
Q

large masses or krill

A

Swarms

54
Q

Special appendages found in amphipods that are used for feeding

A

Gnathopods

55
Q

Feathery appendages found in barnacles that function in feeding

A

Cirripeds

56
Q

Structures on the heads of arrow worms used to catch prey

A

Grasping spines

57
Q

INternal skeleton

A

Endoskeleton

58
Q

Plates of calcium carbonate that make up enchinoderm endoskeleton

A

Ossicles

59
Q

pincher like structures found on skin of echinoderms

A

Pedicellariae

60
Q

System of tubes found in echinoderms that circulate water through body and functions in locomotion, feeding, gas exchange and excretion

A

Water vascular system

61
Q

Site at which water enters the water vascular system of echinoderms

A

madreporite

62
Q

Tube feet

A

Podia

63
Q

Side opposite the mouth in an echinoderm

A

Aboral surface

64
Q

To cast off a body part in defense (sea stars)

A

Autotomize

65
Q

Hard endoskeleton of an echinoid echinoderms

A

Test

Marine Biology (6 decks)

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