1. Animals are multicellular organisms that obtain energy by consuming other organisms. They are classified as vertebrates, which have backbones, or invertebrates, which do not. 2. The document describes several animal phyla - Cnidaria, which includes jellyfish and coral, have stinging cells; Annelida includes segmented worms; Mollusks have a muscular foot and shells; Echinodermata are spiny with radial symmetry and tube feet; Arthropoda are the most successful and include insects, spiders, and crustaceans; and Chordata are backboned and include fish, amphibians, reptiles, birds, and mammals. 3.

1. Animal Phylum

3. Animals
What are ANIMALS?
1. Many celled organisms that must get
energy by eating other organisms.
a. Herbivores – animals that eat only plants
a. Carnivores – animals that eat other animals
b. Omnivores – animals that eat both plants
and animals

4. Animals
2. Classified based on the presence or
absence of a backbone.
a. Invertebrates – no backbone (95 % of all
animals)
b. Vertebrates – backbone (only 5% of all
animals)

5. Phylum Cnidaria – “Stinging Cells”
1.
2.
3.
4.
Invertebrates
All have Stinging cells – nematocysts
All marine
Simple organisms – just tissue, no
organs
5. Examples:
“Cnidarians”
a. Jelly fish
b. Coral and Anemones

6. Cnidarians

7. Phylum Annelida – Segmented
Worms
1.
2.
3.
4.
Invertebrates with segmented body parts
Bristles (hairs) on body
Land and marine
Examples:
a. Earthworms
b. leeches
“Annelids”

8. Annelids

9. Phylum Mollusks – Muscular foot
1.
2.
3.
4.
Invertebrates
Mantle – shells
Land and marine
Examples:
a. Snails and slugs
b. Octopus and squid
c. clams
“Mollusks”

10. Mollusks

11. Phylum Echinodermata – “Spiny
skin”
1. Invertebrates – no backbone
2. All Marine
3. Radial symmetry, 5 appendages and
tube feet for suction
4. Examples:
“Echinoderms”
a. Sea stars, brittle stars
b. Sea cucumbers and sea lilies
c. sea urchins

12. Echinodermata – “Spiny skin”

13. Echinodermata – “Spiny skin”

14. Phylum Arthropoda – “Jointed
Appendages”
1.
2.
3.
4.
Invertebrates
Exoskeleton of chitin
Jointed appendages
Land, marine and air
a.
b.
c.
d.
Most successful of all animals
75% of all organisms on earth
Insects – 6 legs
Arachnids – 8 legs
“Arthropods”
5. Examples:
a. Insects and spiders
b. Crabs and crustaceans

15. Arthropods

16. King Crab

17. Phylum Chordata – Backboned
animals
1.
2.
3.
4.
5.
Vertebrates
Endo skeleton – inside of body
Land, marine and air
Most diverse phylum, many different types
Examples:
a.
b.
c.
d.
Amphibians
Fish
Reptiles and birds
Mammals (humans)
“Chordates”

18. Chordates

19. Questions
1. What phylum of organisms is the
largest?
2. What phylum has radial symmetry and
tube feet?
3. Arthropods have an exoskeleton made
up of ?
4. Which phylums are vertebrates and
which ones are invertebrates?