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10.5: Cartilaginous Fish

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

TermDefinition
barbels Whisker-like organs that sense the environment to help the sharks find food.
cartilage Tough yet flexible material that lends support.
cartilaginous fish Class of fish, including sharks and rays, with a skeleton of cartilage.
Leydig’s organ Organ that produces red blood cells; found only in sharks and rays.
ovoviparous Describes an organism that retains fertilized eggs inside the body, so that the young hatch internally and are born alive.
placoid scales Tough scales that originate from modified teeth.

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Description
Difficulty Level:
At Grade
Grades:
7 , 8
Date Created:
Nov 29, 2012
Last Modified:
Aug 30, 2016
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