Echinoderms

Question 1

marine invertebrates with radial symmetry and a water vascular system; name means “spiny skin”

Answer 1

echinoderms

Question 2

made up of calcium carbonate plates and spines; enclosed by epidermis

Answer 2

endoskeleton

Question 3

claw-shaped appendages with movable jaws; remove unwanted particles from the body

Answer 3

pedicellariae

Question 4

filters water into the vascular system

Answer 4

madreporite

Question 5

circular canal that carries water in the water vascular system

Answer 5

radial canal

Question 6

circular canal near the mouth

Answer 6

ring canal

Question 7

appendages on an echinoderm

Answer 7

rays

Question 8

symmetry around a center

Answer 8

radial symmetry

Question 9

property of being divisible into equal halves

Answer 9

bilateral symmetry

Question 10

system of water-filled canals that help echinoderms extend-retract limbs

Answer 10

water vascular system

Question 11

contains parts like ossicles, plates, spines, and suckers

Answer 11

ambulacral groove

Question 12

one of the calcium carbonate plates that makes up the endoskeleton of an echinoderm

Answer 12

ossicle

Question 13

digestive glands connecting to the pyloric stomach

Answer 13

pyloric caecum

Question 14

secondary stomach that receives and digests food from the primary stomach

Answer 14

pyloric stomach

Question 15

stomach that can be pushed out of the body to catch prey

Answer 15

cardiac stomach

Question 16

muscular sack that pushes water to move tube feet

Answer 16

ampulla

Question 17

reproductive organs

Answer 17

gonads

Question 18

central region of sea stars from which rays radiate; contains mouth, madreporite, and anus

Answer 18

central disc

Question 19

part of the water vascular system that is a hollow tube with suction cups to help echinoderms cling to rocks

Answer 19

tube feet

Question 20

asexual reproduction

Answer 20

external fertilization

Question 21

growing back limbs

Answer 21

regeneration

Question 22

star-shaped echinoderms

Answer 22

sea stars

Question 23

close relatives of starfish that crawl around the ocean floor with their arms

Answer 23

brittle stars

Question 24

round, spiny echinoderms

Answer 24

sea urchins

Question 25

flattened, burrowing sea urchins

Answer 25

sand dollars

Question 26

echinoderms that are attached to the sea bottom by a stalk

Answer 26

sea lilies

Question 27

relatives of sea lilies

Answer 27

feather stars

Question 28

echinoderms with a long, leathery body and one single branched gonad; found on the ocean floor

Answer 28

sea cucumbers

Question 29

small, circular echinoderms related to sea stars; have no arms but spines

Answer 29

sea daisies