echinoderm

Question 1

Endoskeleton

Answer 1

the internal bone or cartilage structure of animals.

Question 2

Pedicellariae

Answer 2

small, stalk-shaped structure of the sea urchin and other echinoderms.

Question 3

Madreporite

Answer 3

essential part of the circulation system in echinoderms.

Question 4

Radial canal

Answer 4

a tube extending outward along each ambulacral area from the circumoral canal in most echinoderms

Question 5

Arm / Ray

Answer 5

the bony or cartilaginous spines of the fin of a fish

Question 6

Radial Symmetry

Answer 6

arrangement of parts of an organism around a single main axis.

Question 7

Bilateral Symmetry

Answer 7

the balanced distribution of duplicate body parts or shapes within the body of an organism.

Question 8

Water Vascular System

Answer 8

is a hydraulic system used by echinoderms.

Question 9

Ambulacral Groove

Answer 9

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

Question 10

Ossicles

Answer 10

A small bone, particularly applied to the tiny bones of the middle ear.

Question 11

Pyloric Caecum

Answer 11

tubular pouches opening into the alimentary canal

Question 12

Pyloric Stomach

Answer 12

The passage at the lower end of the stomach that opens into the duodenum.

Question 13

Cardiac Stomach

Answer 13

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

Question 14

Ampullae

Answer 14

enlargement of the ducts from the liver and pancreas

Question 15

Gonad

Answer 15

The sex organ producing gametes.

Question 16

Central Disc

Answer 16

Central region of sea stars & brittle stars from which rays or arms radiate; contains madreporite, mouth, & anus

Question 17

Tube Feet

Answer 17

fluid-filled muscular tubes of echinoderms.

Question 18

External Fertilization

Answer 18

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

Question 19

Regeneration

Answer 19

the process of renewal, restoration, and growth that makes genomes, cells, organisms, and ecosystems

Question 20

Sea star

Answer 20

star-shaped and usually has five rays, though the number of rays varies from five to forty or more

Question 21

Brittle star

Answer 21

They crawl across the sea floor using their flexible arms for locomotion

Question 22

Sea urchin

Answer 22

are usually enclosed in thin brittle globular tests covered with movable spines.

Question 23

Sand dollar

Answer 23

refers to species of extremely flattened, burrowing sea urchins

Question 24

Sea lilies

Answer 24

marine animals that make up the class Crinoidea of the echinoderms

Question 25

Feather stars

Answer 25

occur chiefly on rocky bottoms in shallow water.

Question 26

Sea cucumbers

Answer 26

are marine animals with a leathery skin and an elongated body containing a single, branched gonad

Question 27

Sea daisies

Answer 27

has a delicately plated dorsal surface which delimits the disc-like body with a single peripheral series of flattish, oar blade-like spines.