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Zoologu > Echinoderms > Flashcards

Echinoderms Flashcards

1
Q

Define echinodermata

A

Spiny skin

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2
Q

Where do echinoderms live?

A

Shallow coastal waters
Ocean trenches

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3
Q

What are examples of echinoderms

A

Sea stars
Brittle stars
Sand dollars
Sea cucumbers

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4
Q

Immature

A

Free swimming bilaterally symmetrical larva

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5
Q

Mature

A

Bottom dwelling with radial symmetry

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6
Q

Pentatadial symmetry

A

5 radi or múltiples of 5

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7
Q

Endoskeloton

A

Calcium plates, protruding spines possible

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8
Q

Tube feet

A

Movement, feeding, respiration, excretion

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9
Q

What systems do echinoderms not have?

A

Circulatory
Respiratory
Excretory

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10
Q

What does the nervous system miss in echinoderms

A

No head or brain

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11
Q

Dioecious

A

Reproduce sexually

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12
Q

Asexually

A

Regeneration

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13
Q

Class crinoidea

A

Lilylike
Can look like feathers

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14
Q

Examples of crinoidea

A

Sea lilies
Feather stars

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15
Q

Crinoidea fun facts

A

Sessile
Long stalks attach to rocks/ ocean floor
They eventually detach
Sticky tube feet

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16
Q

Where and what do the sticky tube feet do?

A

At the end of each arm catches food and aids in respiration

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17
Q

Class asteroidea

A

Star like

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18
Q

Examples of asteroida

A

Starfish
Sea stars

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19
Q

Where are sea stars found

A

Coastal shores world wide

20
Q

What do sea stars eat

A

Oysters and clams

21
Q

Class ophiuroidea

A

Snakelike

22
Q

What is the largest class

A

Ophiuroidea

23
Q

Examples of ophiuroidea

A

Basket stars
Brittle stars

24
Q

Ophiuroidea fun facts

A

Thin brittle arms break off
Regenerates quickly

25
Q

Ophiuroidea are what kind of eaters?

A

Scavengers- take food off ocean floor with arms and tube feet

26
Q

How do ophiuroidea trap food?

A

With their mucous strands between their spines

27
Q

Class echinoidea

A

Hedgehoglike

28
Q

Examples of echinoidea

A

Sand dollars and sea urchins

29
Q

Echinoidea fun facts

A

Compacted internal organs
Aristotles lantern
Barbs

30
Q

Aristotle’s lantern

A

Complex jawlike mechanism used to grind their food= dorsal side

31
Q

Barbs along spine

A

Protective maybe venomous

32
Q

Example of class holothuroidea

A

Sea cucumbers

33
Q

What type of body does a sea cucumber have?

A

Soft body
Feeding tentacles
Can regenerate

34
Q

Class holothuroidea feeds by

A

Tentacles around the mouth sweep up sediment from the water

35
Q

What special thing can sea cucumbers do?

A

Evisceration

36
Q

Evisceration

A

Eject internal organs outside the body for protection

37
Q

Aboral

A

Top of the body, surface

38
Q

Oral

A

Mouth underside

39
Q

Ossicles

A

Sharp protective spines made of calcium plates, covered with thin epidermal layer

40
Q

Pedicellariae

A

Tiny forceps that protect and clean the body surface

41
Q

Water vascular system

A

Hydrostatic pressure allows movement

42
Q

In what flow does the water vascular system move

A

Madreporite to ring canal to radial canal

43
Q

Ampulla

A

Bulblike sac connects to tube foot

44
Q

Coelom

A

Fluid filled and distributes nutrients and oxygen

45
Q

Dermal skin gills

A

Protect coelom lining

46
Q

Nerve ring

A

Surrounds mouth and branches off into nerve cords in each arm

47
Q

Eyespots

A

On each arm responds to light

Zoologu (10 decks)

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