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Kingdom ANIMALIA, Part 1:

Invertebrate Phyla every person

should know

Designed by Prof. Annie Hannan for your learning pleasure.

Phylum PORIFERA

The Porifera include the sponges,

the most primitive animal phylum.

PORIFERA - SPONGES

• FILTER FEEDS ON PLANKTON

• REPRODUCES BY ASEXUALLY (BUDDING) OR

SEXUALLY

• INDIVIDUAL CELLS MAINTAIN HOMEOSTASIS;

NO TISSUES OR ORGANS; COLD-BLOODED

• IS ASYMETRICAL AND MULTICELLULAR BUT

HAS NO TISSUES OR ORGANS

• FOUND IN MARINE AND FRESH WATER

ENVIRONMENTS

• 9000 SPECIES, 150 OF WHICH ARE FRESH

WATER SPECIES

Phylum CNIDARIA

The Cnidarians have stinging cells

and are motile at some point in

their life cycle.

CoralsJellyfish Sea Anemones

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CNIDARIA• USES STINGING NEMATOCYSTS TO STING AND

DISABLE FISH

• DIGESTIVE SYSTEM HAS ONLY ONE OPENING

• REPRODUCES BY BUDDING & SEXUALLY

• NO ORGAN SYSTEMS BUT DOES HAVE DISTINCT

TISSUES; COLD-BLOODED

• HAS RADIAL SYMMETRY

• FOUND IN MARINE AND FRESH WATER; FOOD FOR

SEA TURTLES, PROTECTION FOR CLOWN FISH

• OVER 10,000 SPECIES OF CNIDARIANS

‘WORM’ PHYLA

• Phylum PLATYHELMINTHES

(FLAT WORMS)

• Phylum NEMATODA (ROUND WORMS)

• Phylum ANNELIDA

(SEGMENTED WORMS)

Phylum PLATYHELMINTHES

(FLAT WORMS)Phylum NEMATODA - ROUNDWORMS

Phylum ANNELIDA

(SEGMENTED WORMS)

‘WORM’ PHYLA

• SOME ARE PARASITES WHILE OTHERS ARE FREE-LIVING DECOMPOSERS

• REPRODUCE SEXUALLY AND ASEXUALLY

• HAVE A SIMPLE DIGESTIVE SYSTEM, A SIMPLE NERVOUS SYSTEM, AND A SIMPLE CIRCULATORY SYSTEM = ORGANIZED INTO ORGAN SYSTEMS

• HAS BILATERAL SYMETRY AND CEPHALIZATION

• 12,000 SPECIES IN EACH OF THE THREE PHYLA

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Phylum MOLLUSCA

Mollusks are found on land and on sea

and many live inside a shell.

Land SnailGiant clam

Some mollusks have extremely

complex body systems and behaviors.

Octopus Nautilus

MOLLUSCA

• SOME ARE HERBIVORES, SOME ARE FILTER-

FEEDERS, AND SOME ARE CARNIVORES

• MANY ARE HERMAPHRODITIC (BOTH MALE AND

FEMALE ORGANS)

• HAVE CIRCULATORY, EXCRETORY, DIGESTIVE,

AND NERVOUS SYSTEMS

• HAVE A SHELL, A MANTLE FOR OXYGEN-

EXCHANGE, AND A FOOT FOR LOCOMOTION

• TERRESTRIAL, FRESHWATER, AND MARINE

• 110,000 SPECIES WORLDWIDE

Phylum ARTHROPODA

Class ARACHNIDAPhylum ARTHROPODA

Subphylum CRUSTACEA

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Phylum ARTHROPODA

Class MYRIOPODA

Phylum ARTHROPODA

Class INSECTA

ARTHROPODA

• ARE HERBIVORES, CARNIVORES, AND

DECOMPOSERS

• HAVE A SEXUAL LIFE CYCLE WITH SOME

MOLTING AND SOME METAMORPHOSIZING

• HAVE OPEN CIRCULATORY SYSTEM, NERVOUS

AND DIGESTIVE SYSTEMS

• HAVE SEGMENTED BODIES WITH JOINTED

APPENDAGES, EXOSKELETONS, AND BILATERAL

SYMMETRY, MAY HAVE WINGS

• OVER 1 MILLION SPECIES

Phylum ECHINODERMATA

Echinoderms have radial symmetry

and have embryological development

similar to chordates.

Sea Urchins Starfish

ECHINODERMATA

• ALL ARE VORACIOUS CARNIVORES

• CAN REGENERATE OR REPRODUCE SEXUALLY

• HAVE A COMPLEX ‘WATER VASCULAR’ SYSTEM

FOR MOVING AROUND; HAVE A NERVOUS AND

DIGESTIVE SYSTEM

• HAVE RADIAL SYMMETRY IN ADULTS

• RESTRICTED TO MARINE ENVIRONMENTS

• HAVE AN ENDOSKELETON

• 6,000 SPECIES