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Flashcards in Echinoderm Test Deck (59):
1

Where are the light sensitive eyespots of a sea star located?

Small tentacles at the tip of each arm

2

What joins the ossicles together on echinoderms?

CT and muscle fibers

3

Gas exchange in a sea star takes place through which of the following two structures?

Tube feet, skin gills

4

For what purposes do brittle stars use their arms?

Take food into their mouths, to crawl rapidly along the bottom

5

How do brittle stars free themselves from predators?

Autonomy

6

Organisms in the class Echinoidea contain these structures, which are sometimes poisonous for protection?

Spines

7

5 toothed mouth called aristotles lantern is located in which organism?

Sea urchin

8

What are the tentacles surrounding the mouth of a sea cucumber used for?

Feeding

9

The test is the internal skeleton for which organism?

Sea urchin

10

Which of these are the most highly mobile echinoderms?

Brittle or serpent stars

11

Which echinoderm rolls up into a ball to travel in the ocean surge, and then opens up to feed?

Basket stars

12

Sea cucumbers have the ability to spit out a portion of their intestines to distract predators, what's this called?

Evisceration

13

Podia is another name for

Tube feet

14

Circulation of water through a sea star accomplishes what 3 things?

Movement, excretion of waste, gas exchange

15

Asteroids feed on which of the following?

Bivalves

16

Sea stars use what for movement?

Tube feet

17

Sea stars use this system to circulate water through their bodies

Hydro vascular

18

With what do sea stars pry open the shells of scallops, clams, mussels?

Tube feet

19

Calcareous plates fused to form the skeleton of most Echinoderms are called?

Ossicles

20

Where are tube feet housed?

Ambulacral grooves

21

Small pitcher like structures of Echinoderms, used for collecting food, protection, and sometime camouflage

Pedicellariae

22

Stone canal, ring canal, radial canal, all part of what body system of Echinoderms?

Hydro vascular

23

Echinoderms have what type of skeleton

Internal

24

Underside of sea star where the mouth is

Oral surface

25

Feeding styles of Echinoderms

Filtering and suspension, predation, vegetarian

26

Skeleton of Echinoderms composed of

Calcium carbonate

27

Water enters hydro vascular system through what structure?

Madreporite

28

Balloon like structures that control extension of tube feet of Echinoderms

Ampulla

29

Body symmetry of adult Echinoderms

Pentamerous radial

30

What type of symmetry do Echinoderms have during their larval stage?

Bilateral

31

What body systems do Echinoderms not have?

Circulatory, respiratory, excretory

32

Do Echinoderms have a nervous system?

Yes, but they have no head or brain

33

What is the oral surface of Echinoderms?

Mouth located on this side

34

What is aboral surface of Echinoderms?

Top of body

35

Trace the movement of water through the water vascular system

Water enters through the madreporite, passes through stone canal to ring canal, enters radial canal, and connects to tube feet and ampulla

36

Which Echinoderms are filter feeders?

Brittle stars, crinoids

37

Which Echinoderms are grazers?

Sea urchin

38

Which Echinoderms are detritavores?

Sea stars

39

Which Echinoderms are predators?

Sea stars

40

Which Echinoderms are suspension feeders?

Sea cucumber

41

In Echinoderms where are eggs and sperm produced?

In the arms

42

What are free swimming larva

Bipannaria

43

What are the classes of Echinoderms?

-Holothuroidea
-Crinoidea
-Echinoidea
-Ophiuroidea
-Asteroidea

44

What organisms are in the class Holothuroidea?

Sea cucumbers/ sea pig

45

What organisms are in Crinoidea?

Sea lilies

46

What organisms are in Echinoidea?

Sea urchins, sand dollars, sea biscuits

47

What organisms are in Ophiuroidea?

Brittle stars

48

What organisms are in Asteroidea?

Sea stars

49

What is a sea cucumbers defense?

Ejects guys through the cloaca
(Cloaca: opening used for reproduction and excretion)

50

How do sea cucumbers feed?

Sift through sand

51

What type of feeders are sea lilies?

Filter feeders

52

Characteristics of sea lilies?

Long feather like arms and short hook like legs called cirri
-upward facing mouths

53

What do sea urchins feed on?

Algae

54

What eats sea urchins?

Otters

55

What is the test of the sea urchin?

Exoskeleton that houses internal organs

56

How do brittle/basket stars feed?

Suspension/filter feeders
-produce mucus to catch food

57

What do sea stars eat?

Oyster, clams, mussels

58

How many stomachs do sea stars have?

2

59

What are the 2 stomachs?

Cardiac and pyloric
-cardiac: everted out of organism to digest prey