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Echinoderms Review. Animalia. Echinodermata. Starfish belong in the KINGDOM _______________ PHYLUM _______________ CLASS ___________________. Asteroidea. invertebrates. Echinoderms are _________________ vertebrates invertebrates. radial.

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Echinoderms Review

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Echinoderms review l.jpg

EchinodermsReview


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Animalia

Echinodermata

Starfish belong in the

KINGDOM _______________

PHYLUM _______________

CLASS ___________________

Asteroidea

invertebrates

Echinoderms are _________________

vertebrates invertebrates


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radial

Adult echinoderms have ______________ symmetry.

no bilateral radial

Deuterostomes

_____________ are organisms

whose anus develops from the blastopore area in the embryo.


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Cardiac

The ______________ stomach in a starfish is extruded out through the mouth to eat.

Since a starfish has NO INTESTINE,the nutrients are absorbed by the

_______________

digestive glands


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Pyloric stomach

Portion of the stomach that is connected to the anus and digestive glands

Echinoderms have an endoskeletonmade of calcium carbonate plates called _______________.

ossicles


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Spiny skin

In Latin the name “echinoderm” means__________________

Name one of the 3 characteristics your book lists that are found only in echinoderms.

Endoskeleton made of OSSICLES

Water vascular system

Tube feet


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Asteroidea

Sea stars (starfish) belong to the

Class _________________

The mouth of a starfish is locatedon the _____________ surface.

oral


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Echinodermata (Echinoderms)

All of these organisms belong to the phylum _______________


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pedicillariae

The small tiny pinchers at the base of the spines on the surface of a starfish are called _______________

Water enters the water vascularsystem through small pores in the __________________.

madreporite


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open

Starfish have _____________circulation.

The small movable suction cupped extensions of the water vascular

system which aid in locomotion and

feeding are called _____________.

tube feet


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Squeeze to control water enteringand leaving the tube feet

What is the function of the ampullae?

The seastar can turn its ___________stomach inside out through its mouthwhen it eats.

cardiac


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Compare Digestive and Nitrogen waste

In digestive tract By body cells

Left over frombreakdown of proteins

undigested food during metabolism

Digestive Excretory

Feces ammonia, urea, OR uric acid


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water vascular

The stone canal, ring canal, and radial canal are all parts of the ________________ system.

Nutrients are absorbed in the________________in a starfish.

digestive glands


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LocomotionHold onto & pry open clam shells

Gas exchange/remove nitrogen waste

Tell a function of the tube feet.

The skin gills on the surface connect into the ___________inside.

coelom


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Water vascular

The network of water filled canals connected to the tube feet is called the _________________ system.

carnivores

Most starfish are _______________.

Carnivores herbivores omnivores


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This organ absorbs nutrients in an earthworm and a clam but is missing in starfish

intestine

Echinoderms are thought to be moreclosely related to higher organisms like

vertebrates because _______________

their blastopore becomes the anus just like in higher organisms


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ampulla

The bulb-like sac at the upper end of each tube foot is called the _____________

The spines on the surface connect

into the ____________ inside.

Ossicles of the endoskeleton


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Type of reproduction seen in starfish

Asexual Sexual

They can do both!

Symmetry seen in echinoderm larvae

bilateral


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False, they have separate sexes.

T or FMost echinoderms are hermaphrodites.

Fertilization in echinoderms is

_______________

External internal

external


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skin gills and skin on their tube feet

Seastars “breathe” by exchanginggases through their _____________________________.

Echinoderms are missing all of theseorgans except ____________.Circulatory excretory respiratory digestive

digestive


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Nerve ring or radial nerve

Name one of the parts of the nervous system in a starfish.

The ability of starfish to regrowlost arms is called ________________.

regeneration


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Type of symmetry seen in echinoderm larva

bilateral

General term for reproductive organs

gonads


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stone canal

The tube that connects the madreporite to the ring canal is the ____________________

The surface of a starfish oppositefrom the mouth is the _____________

Surface.

aboral


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pyloric

The digestive glands connect to the __________________ stomach.

cardiac

The ___________________ stomach is extruded out of the mouth during feeding


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Keep surface of starfish free ofalgae and small organisms that might damage or block it

What is the function of thepedicillariae?

Starfish have _____________ at the

ends of each arm that can sense

light and dark

eyespots


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aboral

The anus and madreporite are on the ____________ surface of a starfish.

Echinoderms are _______________

Protostomes Deuterostomes

deuterostomes


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Skin gills

Tube feet

Starfish absorb oxygen through their

_______________ and the surface of their _________________

Name a part of the nervous system in a starfish

Nerve ring, radial nerves, nerve net, eyespots


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Organisms in which the

blastopore becomes the anus are called __________________

deuterostomes

Special kind ofradial symmetryseen is 5 armed starfish

pentaradial


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Skin gills

Body part used in respiration in a starfish

Which of the following is true about the circulatory system in a starfish?

Aortic arches surround the digestive system & pump blood

A heart surrounded by a pericardial cavity pumps hemolymph

No heart or blood vessels. Fluid in the coelom bathes and distributes nutrients & oxygen

No heart or blood vessels. Fluid circulates in the coelom


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Mouth, pyloric stomach, cardiac stomach,

digestive glands, anus

Name a part of the digestive systemin a starfish

All echinoderms are MARINE.That means they ____________.

have military-like camouflage

live in the ocean

march in lines like soldiers

stay in one place

live in oceans


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Water vascular

Tell the body system each part belongs to:

Madreporite _____________________

Nerve ring _____________________

Ring canal ______________________

Ossicles______________________

Gonads______________________

Skin gills______________________

Cardiac stomach ___________________

nervous

Water vascular

Skeletal

Reproductive

Respiratory/excretory

Digestive


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Skin gills

Main body part used in respiration in a starfish

Spines on the surface connect

to the ________________ underneath.

ossicles


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Stone canal

Trace the path that water follows in the water vascular system:Madreporite

_____________________

_____________________

_____________________

tube feet

Ring canal

Radial canal (or abulacral canal)


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pyloric

The digestive glands connect to the __________________ stomach.

Type of symmetry seen in this echinoderm

radial


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ExcretoryRespiratory

Circulatory

Name a body system that is missing in starfish

eucoelomates

Echinoderms are _________________

acoelomates Pseudocoelomates eucoelomates


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Eucoelomates

Invertebrates

Deuterostomes

Spiny skin

Water vascular system with tube feet

Endoskeleton made of ossicles

Radial symmetry

Bipinnaria larva

marine

Name 6 characteristics of Echinoderms

What are the odds you will see a question

like this on the test?

I’d say pretty good!


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Type of larva found in echinoderms

trochophore

bipinnaria

This one!


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ambulacral

Tube feet are found along the

__________________ groove.

When you cut into the starfish, the

space you see around the internal organs is the ______________

Mantle pseudocoelom coelom pericardialcavity cavity

coelom


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oral

The ventral surface is also called the _______ surface.

TRUE or FALSEStarfish are hermaphrodites

False. They have separate sexes


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This diagram represents the 3 structures you learned about on the surface of a starfish.

The blue structures are _____________for _____________________.

The red structures are ____________

for ____________________

The green structure is a _____________

for _________________________

spines

protection

Skin gills

Exchanging gases/removing nitrogen waste

pedicellaria

keeping the surface free of organisms


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madreporite

Tell the function of each part:

Opening for water vascular system _____________________

Absorb nutrients _____________________

Connect madreporite

to ring canal ______________________

Plates that fuse to formskeleton______________________

Make sperm or eggs _________________

Exchange gases and get

rid of nitrogen waste_________________

Digestive glands

Stone canal

ossicles

gonads

Skin gills


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pedicellariae

Tell the function of each part:

Keep skin free of organisms _____________________

Extruded out throughmouth during feeding ________________

Stomach that connects to digestive glands ______________________

Squeeze to move water

up and down in tube feet _________________

Spikes on surface for protection _____________

Cardiac stomach

Pyloric stomach

ampullae

spines


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A

B

E

C

F

D

MADREPORITE

AMPULLAE

A = _________________E = ___________________

B = _________________ F = ___________________

C = _________________

D = _________________

STONE CANAL

TUBE FEET

RING CANAL

RADIAL CANAL


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What do the typhlosole in an earthworm, the ridges on the gills in a clam, and the skin gills of a starfish have in common?

All are structures used to INCREASE SURFACE AREA

Asteroidea comes from the Latin word meaning _______________

star


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echinoderms

The only invertebrates that are NOT PROTOSTOMES are the _________________________

What is the plural of pedicellaria?

pedicellariae


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Live in salt water (oceans)

All echinoderms are MARINE. This means they _______________

How is reproduction in a starfish different from that of an earthworm?

Earthworms= hermaphrodites

Starfish= separate sexes; can use regeneration for asexual reproduction


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Diffusion of gas molecules from

high concentration to low concentration

is what causes gas exchange for breathing

Explain how diffusion is important to starfish

Which of the following is an echinoderm larva?

A B

B: Echinoderms have a: BIPINNARIA larva with wings


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Both have: NO CEPHALIZATION

Open circulation (NO blood vessels)

eucoelomates

invertebrates

separate sexes

sexual reproduction with external fertilization (marine clams)

indirect development (start as larva)

have digestive gland that makes bile and

absorbs nutrients

have stomach attached to digestive gland

Tell one way the starfish are similar to

clams.


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Clams: Starfish:

Protostomes Deuterostomes

Have an intestine No intestine

Heart pumps hemolymph No heart

Gills exchange gases Gases exchanged thru skin gills

Kidney to remove nitrogen no excretory organs/ nitrogen waste out thru skin gills

------- water vascular system

Shell for protection endoskeleton/spines for protection

Filter feeders carnivoressome have internal fertilization external fertilization

(freshwater clams)Sexual reproduction onlyCan do sexual/asexual reprod.

Tell one way the starfish are DIFFERENT FROM clams.


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Both have: true coelomates

invertebrates

sexual reproduction external fertilization

Tell one way the starfish are similar to

earthworms.


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Earthworms: Starfish:

Protostomes Deuterostomes

Intestine to absorb nutrients digestive glands absorb nutrients

Heart (aortic arches) pumps blood No heart

Nephridia to remove nitrogen no excretory organs/ nitrogen waste out thru skin gills

------- water vascular system

Hydrostatic skeleton endoskeleton/spines for protection

Closed circulationOpen circulation

Direct developmentIndirect development

Cerebral ganglia/nerve cord Nerve ring, radial nerves, ganglia

Tell one way the starfish are DIFFERENT FROM earthworms.


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Why are echinoderms thought to have evolved from a bilaterally symmetrical ancestor?

They have a bilaterally symmetrical larva

Which 2 structures you learned about are contained within the ambulacral ridge?

Radial nerve & radial canal


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Sea lily, feather star, brittle star, sea urchin,

Basket star, sand dollar, sea cucumber

Name another echinoderm besides a starfish.

indirectThey start out as a larva that looks different from the adult.

Starfish have __________development.

direct indirect


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Name one of the structures found on the surface of a starfish and tell its function.

Spines- protection

Pedicellaria-pinchers that keep surface

clear of organisms

Skin gills- exchange gases/remove nitrogen waste

True OR FalseSea stars can reproduce both sexually and asexually.

TRUEThey have separate sexes and can use regeneration.


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a brain

A sea star’s nervous system does NOT include ______________

Nerve ring nerve net radial nerves cerebral ganglia

Explain how a mollusk trochophore larva is different from an echinoderm bipinnaria larva.

Trochophore larvae are egg shaped with a ring of cilia to help them swim;

Bipinnaria have wings


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