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Chondrichthyes
8
Transcript
Chondrichthyes (Cartilaginous fish)
Olivia Elliott
Chondrichthyes
-Sharks
-Batoids
-Stingray
-Chimaera
-Edestes
Examples
Support and shape
Support
-Lack true bone structure
-Skeleton made of cartilage
-Pectoral fin
-Pelvic fin
-Caudal fin
-Dorsal fin
-Anal fin
Protection
-Some have electric organs or poison to sting
-teeth
-sharp spines
-eyelid layer protect eyes when attacking
-Scales protect from injury
-adapted to become sophisticated predators
Protection
Movement
-Head and tail move side-side
-Pectoral fins are main driver
-Ram ventilation to push water through gills to help breathe white swimming
-Tail aids movement
-Sharks have oil in their bladders instead of a swim bladder to help maintain buoyency
Diagram
Questions 18-21
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