Phylum Chordata

1
Phylum Chordata
2
Invertebrate Chordates

• Ex. Tunicates/Sea Squirts
• Ex. Lancelet

3
Fishes

• Ectotherms (cold-blooded)
• Lay eggs without a shell
• External fertilization

4
Jawless Fish

• Cartilage skeleton no jaws
• Ex. Lamprey, hagfish

5
Cartilage Fish

• Jaws and cartilage skeletons
• Ex. Sharks, rays and skates

6
Bony Fish

• Have jaws and a bony skeleton
• Have a swim bladder that allows them to float at
  different depths
• Most fish are in this groupperch, eel, trout

7
Amphibians

• Ectothermic, external fertilization, eggs have no
  shell
• Ex. Toads, (thick bumpy skin with poison glands)
  frogs, newts and salamanders

8
Reptiles

• Ectothermic, eggs with a shell, internal
  fertilization
• 3 chambered heart (except crocodiles have 4)
• Amniotic Egg

9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
Birds

• Endothermic (warm-blooded), internal
  fertilization, amniotic eggs
• Build nests to incubate eggs
• Air sacs to increase O2

15
(No Transcript)
16
(No Transcript)
17
Mammals

• Endothermic, mammary glands, hair, sweat glands,
  4 chambered heart, diaphragm
• Divided into 3 groups based on how they reproduce

18
Monotremes lay eggs, ex. Platypus, echidna
19
Marsupials carry immature young in a pouch, ex.
Kangaroo, opossum
20
Placentals carry young in uterusincludes most
mammals.