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What makes us fishes? - PowerPoint PPT Presentation


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What makes us fishes?. Do Now – Reading Check. What structure in humans serves the same function as gills in fish? What is the function of the lateral line in fish? What are 3 of the 6 characteristics that make a fish a fish? . Do Now Answers. Lungs

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Presentation Transcript
do now reading check
Do Now – Reading Check
  • What structure in humans serves the same function as gills in fish?
  • What is the function of the lateral line in fish?
  • What are 3 of the 6 characteristics that make a fish a fish?
do now answers
Do Now Answers
  • Lungs
  • Pick up vibrations in water to make fish more aware of their surroundings
  • Cold-Blooded, Breath using Gills, have fins and scales, have a slime coat, have a lateral line, fish are aquatic.
what are fish quick review
What are Fish – Quick Review
  • They have gills – they allow fish to remove O2 from water.
  • Fish have Scales and Fins
    • Scales can be used to determine the age of fish
  • Fish have a Lateral Line
    • Used to feel vibrations in water to make them more aware of their surroundings
  • Fish create mucous
    • Reduces friction in water and protects them from parasites and disease.
  • Fish have a Swim Bladder
    • They help fish regulate their depth in water
  • Fish are Cold-Blooded
    • Body temperature is controlled by their environment
breakdown of bony fishes
Breakdown of Bony Fishes
  • Actinopterygii– Ray-finned Fishes
  • Sarcopterygii – Lobe-finned Fishes
sarcopterygii lobe finned
Sarcopterygii: Lobe-finned
  • Members of this class of fish were the ancestors of amphibians and other land animals.
  • Their swim bladder functions for both buoyancy AND can function as lungs, also use pneumatic sacs to function as lungs
  • Teeth often present and have true enamel
  • Fins have homologous structures to modern day terrestrial animal limbs. Bones and muscles move out into the fins.
sarcopterygii lobe finned1
Sarcopterygii : Lobe-Finned

Coelocanths

Australian Lungfish

actinopterygii ray finned fishes
Actinopterygii: Ray-finned Fishes
  • There are 3 grades of Actinopterygii, the most abundant are Teleosts
    • Teleosts make up 96% of all living fish
  • Swim bladder moved away from any function for respiration, used only for buoyancy.
  • Fins are flexible, controlled by muscles in body, fins are supported by spines rather than bones