Echinoderms & Chordates

Echinoderms & Chordates are both deuterstomes

True or false

True

Symmetry in adult Echinoderms “spiny skin bearers”

Pentaradial (5 part)

symmetry in Echinoderms larvae

Bilateral

what tissue types do they have?

Triploblasts

what body cavity do they have?

coelomate

what digestive system do they have?

complete digestive system with specialized regions

what nervous system type?

Radial nerve & nerve ring

Where is the nerve ring located?

around the mouth

Where is the radial nerve located?

extends to each arm

What kind of reproduictive system do they have?

sexual, asexual, or Both

Both

they have separate sexes while few are hermaphrodites

True or false

True

Do they remove waste through diffusion?

Yes

What type of circulatory system do they have?

Water vascular system - gas exchange

Is their respiratory system across the body wall and skin/tube feet?

True or false?

True

Asteroida

“star like”

Sea Stars

Ophiuroidea

“Snake tail like”

Brittle stars

Echinoidea

““spiny like”

Urchins, Sand dollars

Holothuroidea

Sea Cucumbers

What is the water vascular system used for?

Hydraulic system for movement

Feeding

Gas exchange

Sensory

What are ossicles?

“armor”

Calcium Carbonate plates making the endoskeletonof echinoderms, providing support and protection.

What are the pedicellaria?

“claw like”

Specialized ossicles for defense

Like claws all over their body

What is the endoskeleton?

Made of ossicles (calcium carbonate)

Made from mesoderm

For star fish is the endoskeleton loose and flexible?

Yes

In sea urchins are they fused?

Yes

In sea cucumbers are ther micrscopic pieces?

Yes

What is Aristottles lantern?

Only in sea urchins

Jaw & tooth

5 teeth like a lantern

structure used for feeding

How do astroidea (sea stars) eat?

Pushes out cardiac stomach to digest food

How do ophiuroidea (brittle stars) eat?

Waits for food to get stuck in their arms

Mostly scavengers

How do echinoidea (sea urchins & sand dollars) eat?

Herbivoresthat use Aristotle's lantern to scrape algae off surfaces.

How do holothuroidea (sea cucumbers) eat?

Use tentacles (modified tube feet) to sift and gather food

Ophiuroidea (brittle stars) produce by fission

True or false

True

Where are these animals found/

only marine habitats

What do asteroidea (star fish) us to move around?

Tube feet

Can tube feet be used for gas exchange, sensing, and suction cups?

Yes

Do asteroidea (sea stars) have the ability to regenerate entire limbs?

Yesthey can regenerate lost arms and, in some cases, entire bodies.

asteroidea (sea stars) & ophiuroidea (brittle stars) can regenerate entire bodies from fragments which can also be used in reproduction

True or false

True

What are the 5 characteristics Urochordata larvae possess? 

Pharyngeal slits

Post anal tail

notochord

dorsal hollow nerve chord

Endostyle