Echinoderms

Question 1

Echinoderm

Answer 1

largest phylum that has no freshwater or terrestrial (land-based) representatives

Question 2

Endoskeleton

Answer 2

an internal skeleton

Question 3

Pedicellariae

Answer 3

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

Ring Canal

Answer 5

the circular water tube that surrounds the esophagus of echinoderms

Question 6

Arm / Ray

Answer 6

The fore limb of an animal

Question 7

Radial Symmetry

Answer 7

segmented symmetry, starfish

Question 8

Bilateral Symmetry

Answer 8

split in half

Question 9

Water Vascular System

Answer 9

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

Question 10

Ossicles

Answer 10

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

Question 11

Pyloric Caecum

Answer 11

This organ with fingerlike projections is located near the junction of the stomach and the intestines

Question 12

pyloric Stomach

Answer 12

chemical digestion (like ours) while the cardiac stomach has little teeth that grind food up

Question 13

Cardiac Stomach

Answer 13

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

Question 14

Amputee

Answer 14

limb amputated

Question 15

Gonads

Answer 15

organ that produces gametes; a testis or ovary

Question 16

Central Disc

Answer 16

Part of the body of a starfish

Question 17

Tube Feet

Answer 17

Suction cup like feet to grip on to things

Question 18

External Fertilization

Answer 18

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

Question 19

Regeneration

Answer 19

Regrow limbs

Question 20

Sea Star

Answer 20

radial symmetry, water vascular system

Question 21

Brittle Star

Answer 21

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

Question 22

Sea Urchin

Answer 22

typically spiny, globular animals

Question 23

Sand Dollar

Answer 23

extremely flattened, burrowing sea urchins

Question 24

Sea lillies

Answer 24

adult is fixed to the sea bottom by a stalk

Question 25

Feather Stars

Answer 25

feather like

Question 26

Sea cucumbers

Answer 26

puke up guts and regrows

Question 27

Sea Daises

Answer 27

deep-sea taxa