Lecture Three zoology classification living things.ppt

Lecture notes

1. ClassificationClassification
Grouping & Identifying Grouping & Identifying
Living ThingsLiving Things

2. Why classify?Why classify?
Think of three examples where we Think of three examples where we
group things.group things.
Why do we group these things?Why do we group these things?

3. Classifying Living ThingsClassifying Living Things
We put livings things into two large We put livings things into two large
groups:groups:
Animals Animals
PlantsPlants

4. AnimalsAnimals
Animals are spilt into two major Animals are spilt into two major
groups:groups:
VertebratesVertebrates
InvertebratesInvertebrates

5. VertebratesVertebrates
These are animals with a backbone.These are animals with a backbone.
There are five groups of vertebrates:There are five groups of vertebrates:
AmphibiansAmphibians
BirdsBirds
FishFish
MammalsMammals
ReptilesReptiles

6. AmphibiansAmphibians
Have moist skinHave moist skin
Lay jelly coated Lay jelly coated
eggs in watereggs in water
Lives on land and Lives on land and
waterwater

7. BirdsBirds
Have feathers and Have feathers and
hollow boneshollow bones
Lay hard shelled Lay hard shelled
eggseggs
Warm bloodedWarm blooded

8. FishFish
Have wet scalesHave wet scales
Lays eggs in Lays eggs in
waterwater
Lives in waterLives in water

9. MammalsMammals
Have hair and Have hair and
produce milkproduce milk
Give birth to live Give birth to live
offspring (no eggs)offspring (no eggs)
Warm bloodedWarm blooded

10. ReptilesReptiles
Have dry scalesHave dry scales
Lay leathery Lay leathery
shelled eggsshelled eggs
Cold bloodedCold blooded

11. Summary of VertebratesSummary of Vertebrates

12. InvertebratesInvertebrates
These are animals without a backboneThese are animals without a backbone
There are eight groups of invertebratesThere are eight groups of invertebrates
MolluscsMolluscs
Flatworms Flatworms
AnnelidsAnnelids
RoundwormsRoundworms
SpongesSponges
EchinodermsEchinoderms
CnidariansCnidarians
ArthropodsArthropods

13. MolluscsMolluscs
Crawl on a single Crawl on a single
fleshy pad.fleshy pad.
Can have a shellCan have a shell

14. FlatwormsFlatworms
Have flat worm Have flat worm
like bodieslike bodies

15. AnnelidsAnnelids
Have round worm Have round worm
like bodieslike bodies
Have bodies Have bodies
divided into divided into
segments segments

16. RoundwormsRoundworms
Have long thin Have long thin
round worm like round worm like
bodiesbodies
Have bodies with Have bodies with
no segmentsno segments

17. SpongesSponges
Have bodies Have bodies
made of loosely made of loosely
joined cellsjoined cells

18. EchinodermsEchinoderms
Have bodies divided Have bodies divided
into five partsinto five parts
Have spiny outer Have spiny outer
coveringcovering

19. CnidariansCnidarians
Have thin sack Have thin sack
like bodieslike bodies
Have tentaclesHave tentacles

20. ArthropodsArthropods
Have lots of legs and segmented Have lots of legs and segmented
bodies.bodies.
There are four group of arthropods:There are four group of arthropods:
 ArachnidsArachnids
Centipedes & MillipedesCentipedes & Millipedes
CrustaceansCrustaceans
InsectsInsects

21. Arthropods - ArachnidArthropods - Arachnid
Have four pairs of Have four pairs of
legs.legs.
Have bodies Have bodies
divided into two divided into two
sectionssections

22. Arthropods – Centipedes Arthropods – Centipedes
& Millipedes& Millipedes
Have long thin Have long thin
bodies and pairs of bodies and pairs of
legs on each of legs on each of
their many body their many body
sectionssections

23. Arthropods - CrustaceanArthropods - Crustacean
Have five-seven Have five-seven
pairs of legspairs of legs
First pair often First pair often
used as pincersused as pincers
Bodies covered Bodies covered
in shellin shell

24. Arthropods - InsectsArthropods - Insects
Have three pairs of Have three pairs of
legslegs
Bodies divided into Bodies divided into
three sectionsthree sections
Often have wingsOften have wings