chordates and fish. chordates 45,000 members must have the following dorsal nerve chord –...

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Chordates and Fish

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Page 1: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Chordates and Fish

Page 2: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage
Page 3: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage
Page 4: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Chordates

• 45,000 members

Must have the following• dorsal nerve chord – vertebrae• cranium – skull• endoskeleton of bone or

cartilage

Page 5: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage
Page 6: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

7 CLASSES of VERTEBRAE

Page 7: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

1. Mammalia

• hair, milk young

Page 8: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

2. Aves

• birds : feathers, hollow bones

Page 9: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

3. Reptilia

• dry scaly skin

Page 10: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

4. Amphibia

• permeable skin

Page 11: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

And 3 that are FISH!

Page 12: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

5. Agnatha

• jawless fish • lampreys and hagfish• round mouth• long eel like bodies• gills evolved to…

Lamprey video

Page 13: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

6. Chondrichthyes

• (kahn-Drick-theeez) • sharks, skates and rays• jaws and paired fins• cartilage skeleton• unique placoid scales

Page 14: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage
Page 15: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

7. Osteichthyes

• (Ahs-tee-Ich-theeez) • bony fish : salmon, bass, etc.• jaws• skeleton of bone• lobe (mud) or ray finned

Largest Bony Fish

Longest Bony fish

Page 16: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations to live and Survive in Water

• trap gas = buoyancy• Trap in organ called gas

bladder/swim bladder• regulates depth with O2, CO2 and N2

Page 17: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations…

• streamline shape

Page 18: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations…

• muscular tail : Caudal fin

Page 19: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations…

• paired fins : 2 dorsal and 2 pelvic

Page 20: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations…

• mucus = less friction

Other escape adaptations

Puffer fish

Page 21: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations…

• gills : gas exchange O2 in and CO2 out

Page 22: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations…

• lateral line system :

nerves for sensing

vibrations in water

Page 23: Chordates and Fish. Chordates 45,000 members Must have the following dorsal nerve chord – vertebrae cranium – skull endoskeleton of bone or cartilage

Adaptations…

• Separate sexes • internal and external

fertilization • spawning

Fish fighting