Kingdom Animalia
All members of Kingdom
Animalia share several
common characteristics
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Multicellular eukaryotes
Heterotrophic (must eat)
Produce sex cells (sperm and egg)
Move
Animal Phyla
• 34 total phyla in kingdom
• Animals are classified into phyla
based on several different criteria
including:
–Body symmetry
–Level of organization
Types of symmetry
• Asymmetry- (no symmetry)
• Radial symmetry- Circular shapetwo identical halves result no
matter how the animal is cut
• Bilateral symmetry-Identical right
& left halves
Asymmetry
Radial Symmetry
Bilateral Symmetry
Levels of Organization
• Cellular- animal is made of
many cells, none of which work
together
• Ex. Sponge
Levels of Organization
• Tissue- Cells work together to
form specialzed tissues like muscle
tissue
• Ex. Jellyfish (Cniderians)
Levels of Organization
• Organs- Cells form tissues that
work together to form organs that
do a specific job (like a heart, or
lung)
Phylum Porifera (sponges)
Phylum Porifera
(sponges)
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Aquatic, marine animals
Sessile (doesn’t move) filter feeder
Saclike bodies with many pores
Asymmetrical
Phylum Porifera (sponges)
• Cellular level of organization
• Reproduce asexually by budding
–If a piece breaks off, then both
will continue to live and grow
Phylum Cnideria (jellyfish)
Phylum Cnideria (jellyfish)
• Tubular, or bell shaped animals
that live in shallow coastal marine
waters
• Have specialized stinging cells
called cnidocytes
• Organized into tissues
• Radially symmetrical
Phylum Nemertea (Ribbon worms)
Phylum Nemertea (Ribbon worms)
• Bilaterally symmetrical
• Usually marine worms
• Have a distinct proboscis to
capture prey, for defense,
locomotion and for burrowing
• Organ level of organization
Phylum Platyhelminthes
(Flatworms)
Phylum Platyhelminthes
(Flatworms)
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Are often parasites
Include tapeworms & flukes
Bilaterally symmetrical
Free living flatworms are even
more complex, having a head, and
well developed nerves and brain
Phylum Nematoda
(Roundworms)
Phylum Nematoda
(Roundworms)
• Found in marine, freshwater and
terrestrial environments
• Some are predators with teeth and
mouth parts, while others are
parasites.
Phylum Nematoda
(Roundworms)
• More complex than flatworms &
ribbon worms, they have a
complete digestive tract, with a
mouth and anus
• Ex. Hookworms, Trichinella, &
pinworms
Phylum
Mollusca
Phylum Mollusca
• Have a three part body planvisceral mass, mantle and foot
• Include clams, oysters (bivalves),
squid(cephalopods), snails
(gastropods) & octopi
Phylum Mollusca
• Mostly marine- also freshwater and
some terrestrial (land)
• Organized on the organ level
Phylum Annelida
Phylum Annelida
• Segmented worms (like
earthworms and leeches)
• Specialized digestive tract
• Well developed heart, with a closed
circulatory system (have blood
vessels)
• Marine, freshwater and terrestrial
Phylum Arthropoda
Phylum Arthropoda
• Over one million species
• Have jointed appendages- head,
thorax, & abdomen
• Have an exoskeleton that they
periodically molt
• Ex. Spiders, crayfish, insects
Phylum Echinodermata
Phylum Echinodermata
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Have an internal skeleton
Radially symmetrical
Include sea stars and sea lillies
Well developed organs and systems
(nervous, circulatory, respiratory,
etc)
Phylum Chordata
Phylum Chordata
• Most advanced animals
• Well developed brain and central
nervous system
• Bilaterally symmetrical
• Include birds, fish (bony and
cartilage), amphibians, reptiles, &
mammals.
• All reproduce sexually