Echinoderms

Question 1

A marine invertebrate

Answer 1

Echinoderm

Question 2

A skeleton located on the inside of the body

Answer 2

Endoskeleton

Question 3

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

Answer 3

Pedicellariae

Question 4

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

Answer 4

Madreporite

Question 5

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

Answer 5

Radial Canal

Question 6

The circular water tube that surrounds the esophagus of echinoderms.

Answer 6

Ring Canal

Question 7

An appendage the echinoderm uses to move things or itself.

Answer 7

Arm/Ray

Question 8

Symmetry on all angles of an organism, such as a jellyfish.

Answer 8

Radial Symmetry

Question 9

Symmetry on both sides of the organism, such as a human

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

Extends from the mouth to the end of each ray or arm.

Answer 11

Ambulacral Groove

Question 12

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

Answer 12

Ossicles

Question 13

One of the tubular pouches opening into the alimentary canal in the pyloric region of most fish.

Answer 13

Pyloric Caecum

Question 14

The distal aperture of the stomach, opening into the duodenum.

Answer 14

Pyloric Stomach

Question 15

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

Answer 15

Cardiac Stomach

Question 16

A roughly spherical flask with two handles, used in ancient Rome.

Answer 16

Ampullae

Question 17

An organ that produces gametes; a testis or ovary.

Answer 17

Gonads

Question 18

Type of herniated or bulging disc that affects the spinal cord

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

Male fertilizing an egg outside of a female’s body.

Answer 20

External Fertilization

Question 21

Healing of a limb that was cut off.

Answer 21

Regeneration

Question 22

Has 5 appendages and a central body

Answer 22

Sea Star

Question 23

Alike to a Sea Star but longer appendages.

Answer 23

Brittle Star

Question 24

A ball with spikes.

Answer 24

Sea Urchin

Question 25

Seen as a circle with a starfish design on it. Often collected.

Answer 25

Sand Dollar

Question 26

Looks like a lily.

Answer 26

Sea Lillies

Question 27

Looks like a bunch of feathers together.

Answer 27

Feather Stars

Question 28

Looks like an underwater slug.

Answer 28

Sea Cucumbers

Question 29

Basically a circle with tiny stubs on it.

Answer 29

Sea Dasies