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12.5: Fish Structure and Function

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

fish

Ectothermic, aquatic vertebrate with a streamlined body and gills for absorbing oxygen from water.

gills

Organs in aquatic organisms composed of thin filaments that absorb oxygen from water.

scales

Outside covering on fish and reptiles; protect fish from predators and parasites, and reduce friction with the water.

swim bladder

Balloon-like internal organ in most fish; can be used to move up or down through the water column by changing the amount of gas it contains.

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Difficulty Level:
At Grade
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Date Created:
Feb 24, 2012
Last Modified:
Aug 28, 2016
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