Skeletons (Grade 10 NSC Matric Life Sciences): Flashcards
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Definition of skeleton
Definition of skeleton
Supporting framework: structure, protection, movement
Three main skeletal system types
Three main skeletal system types
Hydrostatic, exoskeleton, endoskeleton
Hydrostatic skeleton
Hydrostatic skeleton
Fluid-filled cavity providing support via pressure
Animals with hydrostatic skeletons
Animals with hydrostatic skeletons
Jellyfish, octopuses, earthworms, slugs, starfish
Exoskeleton
Exoskeleton
External skeleton covering & protecting body
Exoskeleton material
Exoskeleton material
Chitin, strengthened by calcium carbonate
Animals with exoskeletons
Animals with exoskeletons
Arthropods: insects, spiders, scorpions, crustaceans
Endoskeleton
Endoskeleton
Internal skeleton made of cartilage or bone
Vulnerability during moulting
Vulnerability during moulting
Old exoskeleton shed, new one not hardened yet
Buoyancy in early ocean life
Buoyancy in early ocean life
Water support meant less need for complex skeletons