Echinoderm

Question 1

echinoderm

Answer 1

a marine invertebrate

Question 2

endoskeleton

Answer 2

an internal skeleton

Question 3

pedicellariae

Answer 3

a defensive organ like a minute pincer present in large numbers on an echinoderm

Question 4

madreporite

Answer 4

a perforated plate by which the entry of seawater into the vascular system of an echinoderm is controlled

Question 5

radial canal

Answer 5

one of the numerous minute canals lined with choanocytes which from the paragastric cavity in some sponges and end just below the surface of the sponge

Question 6

ring canal

Answer 6

the circular water tube that surrounds the esophagus of echinoderms

Question 7

arm/ray

Answer 7

branches of a starfish

Question 8

radial symmetry

Answer 8

symmetry around a central axis

Question 9

bilateral symmetry

Answer 9

the property of being into symmetrical halves on either side of a unique plane

Question 10

water vascular system

Answer 10

the network of water vessels in the body the tube feet being operated by hydraulic pressure within the vessels

Question 11

ambulacral groove

Answer 11

extends the mouth to the end of each arm or ray

Question 12

ossicles

Answer 12

a small piece of calcified material forming part of the skeleton of an invertebrate animal such as an echinoderm

Question 13

pyloric caecum

Answer 13

runs along with the digestive system

Question 14

pyloric stomach

Answer 14

digests foo from the cardiac stomach

Question 15

cardiac stomach

Answer 15

the stomach that gets ejected

Question 16

ampulla

Answer 16

a cavity or the dilated end of a duct shaped like a roman ampulla

Question 17

gonads

Answer 17

reproductive parts

Question 18

central disc

Answer 18

the center of a sea star and all the arms or rays come from it

Question 19

tube feet

Answer 19

used for breathing and grasping food or prey

Question 20

external fertilization

Answer 20

fertilization that takes place outside the body and in open water

Question 21

regeneration

Answer 21

being able to regrow a body part or growing into two different creatures

Question 22

sea star

Answer 22

a starfish

Question 23

brittle star

Answer 23

a type of starfish with small arms with brittles on them

Question 24

sea urchin

Answer 24

a small spiny marine animal

Question 25

sand dollar

Answer 25

a round flat sea urchin

Question 26

sea lilies

Answer 26

a sedentary marine echinoderm that has a small body on a long jointed stalk with featherlike arms to trap food

Question 27

feather stars

Answer 27

an echinoderm with a small dislike body long feathery arms for feeding and movement and short appendages for grasping the surface

Question 28

sea cucumbers

Answer 28

an echinoderm that has a thick wormlike body with tentacles around the mouth

Question 29

sea daisies

Answer 29

a plant