What are the main characteristics of echinoderms?

Answer 1

I think you're reading out of a low-level-zoology book, there's actually 14 characteristics. But some of them are really hard to understand, i cant even understand some of them myshelf, but for some that i can understand, I'll type it in

1. Body unsegmented, radial

2.No head, no brain

3.It has a water-vascular system

4.Excretory organs abset( it cant pee)

5.And they can regenerate lost parts.

The other 9 are really hard to understand, i think you wouldn't really understand them

Answer 2

I know 13 types of echinoderms, here are 11:

1)Possess 5-rayed symmetry, mostly radial, sometimes bilateral.

2)Body has more than two cell layers, tissues and organs.

3)Most possesses a through gut with an anus.

4)Body shape highly variable, but with no head.

5)Nervous system includes a circus-esophageal ring.

6)Has a poorly defined open circulatory system.

7)Possesses a water vascular system, which hydraulically operates the tube feet 8) Have feeding tentacles.

9)Without excretory organs.

10)Normally possesses a sub-epidermal system of calcareous plates

11)Feeds on fine particles in the water, detritus or other animals.

Answer 3

1 calcareous exoskeleton

2 water vascualr system

3 Pedicellariae

4 dermal brachiae "skin gills"

5 pentaradial symmetry

Answer 4

Spiny-Bodied

Water Vascualar System

Tube Feet

Lives in Ocean

AKA

Sea Star

Sea Urchin

Sand Dollar

Sea Lilies

Answer 5

Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called a water vascular system.

Answer 6

-They live in the water

-All have radical symmetry

-Able to regenerate

-Can invert their stomachs(most)