Phylum Echinodermata

Question 1

Symmetry type

PE

Answer 1

Radial

Question 2

Classes and example

PE

Answer 2

1.asterodied
Ex: starfish

2.ophiurodied
Ex.brittle star

3.echinoidieo
Ex. Urchins

4.holothuroidied
Ex. Sea cucumbers

5.crinoida
Ex.sea lilies

Question 3

Reproduction

PE

Answer 3

• broadcast spawners
• make and female
• regeneration allows for multiple as long as part of central dick remains

ASEXUAL

Question 4

Movement

PE

Answer 4

• impulse contacts forcing air out through tube foot

- sea stars water enters the sevic plate into ring canal into long radial canals along Bottom of each Ray

Question 5

Respiration

PE

Answer 5

Use water vascular system as week as skin gills to transfer oxygen and carbon dioxide

Question 6

Nervous system

PE

Answer 6

Have no Brian

A nerve ring in the centre and a radial nerve in each arm

Have chemoreceptors for smell and eye spots for sense of light

Question 7

Excretion

PE

Answer 7

Water vascular system diffuses waste our anus

Anus defecated indigestion food

Skin gills release Carson dioxide

Question 8

Digestion

PE

Answer 8

Echinoderms have a mouth, stomach, intestines, and digestive glands

2 openings and one way system

Eat by expelling stomach out of mouth on top of prey once done eating suck stomach back up

Question 9

Circulation

PE

Answer 9

Don’t have circulatory system

Water vascular digestive glands provide nutrients

Question 10

Meaning of Echinodermata

Answer 10

Spiny skin

Question 11

Support structure

PE

Answer 11

Endoskeleton made from calcium carbonate