Echinoderms

Question 1

Define echinodermata

Answer 1

Spiny skin

Question 2

Where do echinoderms live?

Answer 2

Shallow coastal waters
Ocean trenches

Question 3

What are examples of echinoderms

Answer 3

Sea stars
Brittle stars
Sand dollars
Sea cucumbers

Question 4

Immature

Answer 4

Free swimming bilaterally symmetrical larva

Question 5

Mature

Answer 5

Bottom dwelling with radial symmetry

Question 6

Pentatadial symmetry

Answer 6

5 radi or múltiples of 5

Question 7

Endoskeloton

Answer 7

Calcium plates, protruding spines possible

Question 8

Tube feet

Answer 8

Movement, feeding, respiration, excretion

Question 9

What systems do echinoderms not have?

Answer 9

Circulatory
Respiratory
Excretory

Question 10

What does the nervous system miss in echinoderms

Answer 10

No head or brain

Question 11

Dioecious

Answer 11

Reproduce sexually

Question 12

Asexually

Answer 12

Regeneration

Question 13

Class crinoidea

Answer 13

Lilylike
Can look like feathers

Question 14

Examples of crinoidea

Answer 14

Sea lilies
Feather stars

Question 15

Crinoidea fun facts

Answer 15

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

Question 16

Where and what do the sticky tube feet do?

Answer 16

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

Question 17

Class asteroidea

Answer 17

Star like

Question 18

Examples of asteroida

Answer 18

Starfish
Sea stars

Question 19

Where are sea stars found

Answer 19

Coastal shores world wide

Question 20

What do sea stars eat

Answer 20

Oysters and clams

Question 21

Class ophiuroidea

Answer 21

Snakelike

Question 22

What is the largest class

Answer 22

Ophiuroidea

Question 23

Examples of ophiuroidea

Answer 23

Basket stars
Brittle stars

Question 24

Ophiuroidea fun facts

Answer 24

Thin brittle arms break off
Regenerates quickly

Question 25

Ophiuroidea are what kind of eaters?

Answer 25

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

Question 26

How do ophiuroidea trap food?

Answer 26

With their mucous strands between their spines

Question 27

Class echinoidea

Answer 27

Hedgehoglike

Question 28

Examples of echinoidea

Answer 28

Sand dollars and sea urchins

Question 29

Echinoidea fun facts

Answer 29

Compacted internal organs Aristotles lantern Barbs

Question 30

Aristotle’s lantern

Answer 30

Complex jawlike mechanism used to grind their food= dorsal side

Question 31

Barbs along spine

Answer 31

Protective maybe venomous

Question 32

Example of class holothuroidea

Answer 32

Sea cucumbers

Question 33

What type of body does a sea cucumber have?

Answer 33

Soft body Feeding tentacles Can regenerate

Question 34

Class holothuroidea feeds by

Answer 34

Tentacles around the mouth sweep up sediment from the water

Question 35

What special thing can sea cucumbers do?

Answer 35

Evisceration

Question 36

Evisceration

Answer 36

Eject internal organs outside the body for protection

Question 37

Aboral

Answer 37

Top of the body, surface

Question 38

Oral

Answer 38

Mouth underside

Question 39

Ossicles

Answer 39

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

Question 40

Pedicellariae

Answer 40

Tiny forceps that protect and clean the body surface

Question 41

Water vascular system

Answer 41

Hydrostatic pressure allows movement

Question 42

In what flow does the water vascular system move

Answer 42

Madreporite to ring canal to radial canal

Question 43

Ampulla

Answer 43

Bulblike sac connects to tube foot

Question 44

Coelom

Answer 44

Fluid filled and distributes nutrients and oxygen

Question 45

Dermal skin gills

Answer 45

Protect coelom lining

Question 46

Nerve ring

Answer 46

Surrounds mouth and branches off into nerve cords in each arm

Question 47

Eyespots

Answer 47

On each arm responds to light