echinoderm

Question 1

a marine invertebrate

Answer 1

echinoderm

Question 2

an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

Answer 2

endoskeleton

Question 3

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

Answer 3

Pedicellariae

Question 4

an essential part of the circulation system in echinoderm

Answer 4

Madreporite

Question 5

forming part of the water-vascular system, that extend from the stone canal

Answer 5

Radial canal

Question 6

the circular water tube that surrounds the esophagus of echinoderms

Answer 6

Ring canal

Question 7

allow them to move and guide themselves

Answer 7

Arm / Ray

Question 8

symmetry around a central axis, as in a starfish or a tulip flower.

Answer 8

Radial Symmetry

Question 9

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

Answer 9

Bilateral Symmetry

Question 10

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

Answer 10

Water Vascular System

Question 11

s a term typically used in the context of anatomical parts of the phylum Echinodermata or class Asteroidea and Edrioasteroidea

Answer 11

Ambulacral Groove

Question 12

a very small bone, especially one of those in the middle ear.

Answer 12

Ossicles

Question 13

a number of small outpocketings

Answer 13

Pyloric Caecum

Question 14

sphincter, or valve, is a strong ring of smooth muscle at the end of the pyloric canal which lets food pass from the stomach to the duodenum

Answer 14

Pyloric Stomach-

Question 15

occupies much of the posterior aspect of the head and the anterior thoracic body cavity.

Answer 15

Cardiac Stomach

Question 16

the dialations of the semicircular canals of the ear

Answer 16

Ampullae

Question 17

an organ that produces gametes; a testis or ovary

Answer 17

Gonads

Question 18

having the body radially arranged, usually in the form of a star, with five or more rays or arms radiating from a central disk; asteroid

Answer 18

Central Disc

Question 19

each of a large number of small, flexible, hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food and operated by hydraulic pressure within the water-vascular system

Answer 19

Tube Feet

Question 20

is a male organism’s sperm fertilizing a female organism’s egg outside of the female’s body

Answer 20

External Fertilization

Question 21

the action or process of regenerating or being regenerated, in particular the formation of new animal or plant tissue.

Answer 21

Regeneration

Question 22

are star-shaped echinoderms belonging to the class Asteroidea

Answer 22

Sea star

Question 23

are echinoderms in the class Ophiuroidea closely related to starfish

Answer 23

Brittle star

Question 24

archaically called sea hedgehogs, are small, spiny, globular animals

Answer 24

Sea urchin

Question 25

extremely flattened, burrowing sea urchins

Answer 25

Sand dollar-

Question 26

marine animals that make up the class Crinoidea

Answer 26

Sea lilies

Question 27

n echinoderm with a small disklike body, long feathery arms for feeding and movement, and short appendages for grasping the surface

Answer 27

Feather stars

Question 28

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

Answer 28

Sea cucumbers

Question 29

are small, circular animals related to sea stars. ... Sea daisies have no arms, but the circle is rimmed with flat spines that look like daisy petals

Answer 29

Sea daisies