1. Intro to the Animal Kingdom

2. What is an Animal? Kingdom Animalia Multicellular; eukaryotic
Reproduce sexually & asexually
Specialized Parts
cells --> tissues --> organs --> organ systems
Movement (adaptation that helps get food!)
Consumers

3. Classifying Animals Invertebrates Vertebrates No backbone
Make up more than 95% of all animals
Examples: insects, snails, worms, jellyfish
Vertebrates
Has a backbone
Make up less than 5% of all animals
Include: fish, amphibians, reptiles, birds & mammals

4. Invertebrate Characteristics
Great diversity in this group
Three basic body plans (called symmetry)
Bilateral
Radial
Asymmetrical
Nerves
Guts

5. Bilateral Symmetry
Two sides of the body mirror each other

6. Radial Symmetry
Body is organized around the center, like spokes on a wheel

7. Asymmetrical Not Symmetrical!
You cannot draw a straight line to divide its body into 2 or more equal parts

8. Invertebrates Have no backbone Classified by their type of symmetry
Groups of Invertebrates:
Sponges
Cnidarians
Flat Worms
Round Worms
Annelid Worms
Mollusks
Arthropods
Echinoderms

9. Invertebrate Nerves All animals have nerves except sponges
The job of nerves:
Sense environment
Send messages around the body to control the animal’s actions

10. Invertebrate Nerve Structure
Simple Inverts have nerve cords
Packs of nerves on a single path
Some Inverts have ganglia
Concentrated mass of nerve cells;
each ganglion controls different parts of the body
Ganglia are connected by nerve cords
Complex Inverts have a brain to control the ganglia

11. Invertebrate Guts Gut: Coelom (see-lum) digestive tract
breaks down food which cells then absorb
In some complex inverts, it’s inside the coelom
Coelom (see-lum)
Body cavity that surrounds the gut in complex Inverts
Contains organs (heart, lungs, etc.)
Keeps digestion separate from other body processes