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Invertebrates - PowerPoint PPT Presentation


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Invertebrates. Octopus Video. Phylum Chordata. C. Vertebrata Share four chordate characteristics + vertebral column (spine, backbone) Spine encloses and protects nerve cord (spinal cord) Anterior end of spinal cord = brain protected by skull made of bone or cartilage 1. Fishes

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PowerPoint Slideshow about ' Invertebrates' - eunice


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slide1

Invertebrates

Octopus Video

slide2

Phylum Chordata

C. Vertebrata

  • Share four chordate characteristics + vertebral column (spine, backbone)
    • Spine encloses and protects nerve cord (spinal cord)
    • Anterior end of spinal cord = brain protected by skull made of bone or cartilage

1. Fishes

    • Oldest group of vertebrates (530 mya)
    • 27,000+ species (15,600+ marine spp.)
    • Three major groups
slide4

Fishes

  • Class Agnatha – Jawless fish
    • No jaws
    • Unpaired fins and no scales
    • Hagfishes
slide5

Fishes

  • Class Agnatha – Jawless fish
    • Hagfishes
slide6

Fishes

  • Class Agnatha – Jawless fish
    • Lampreys
slide7

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Includes sharks, rays, skates and ratfish
    • Cartilage skeleton
    • Movable jaws
    • Paired and Unpaired fins
    • Placoid scales
slide8

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Sharks
      • Fusiform body
      • Heterocal caudal fin
      • Characteristic dorsal fin
      • Gill slits
      • Powerful jaws
slide9

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Sharks
      • Wide size range
slide10

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Sharks
      • Very good sensory organs
slide11

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Sharks
      • Reproduction – live young or eggs
slide12

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Sharks
      • Commercially hunted
slide13

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Rays and Skates
    • Dorsally flattened bodies
    • Demersal
    • Ventral gills
    • Modified pectoral fins
      • Stingrays
slide14

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Rays and Skates
    • Dorsally flattened bodies
    • Demersal
    • Ventral gills
    • Modified pectoral fins
      • Stingrays
slide15

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Rays and Skates
      • Electric Rays
slide16

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Rays and Skates
      • Manta Rays
slide17

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Rays and Skates
      • Skates
slide18

Fishes

  • Class Chondrichthyes – Cartilaginous Fishes
    • Ratfishes
slide19

Fishes

  • Class Osteichthyes – Cartilaginous Fishes
    • Skeleton of bone
    • Make up 96% of all fish
    • Cycloid and ctenoid scales
    • Operculum
    • Homoceral fin
slide20

Fishes

  • Class Osteichthyes – Cartilaginous Fishes
    • Fin rays
    • Terminal mouth
    • Swim bladder
slide21

Fishes - Biology

  • Body Shapes
    • Strongly related to lifestyle
slide22

Fishes - Biology

  • Body Shapes
    • Fusiform

Video

slide23

Fishes - Biology

  • Body Shapes
    • Laterally Compressed

Video

slide24

Fishes - Biology

  • Body Shapes
    • Flattened
slide25

Fishes - Biology

  • Body Shapes
    • Eel-like

Video

slide26

Fishes - Biology

  • Body Shapes
    • Unusual, Irregular

Video

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