UNIT 8 ANIMALS.

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Echinodermata Spiny Skinned.

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Presentation transcript:

UNIT 8 ANIMALS

Phylum nematoda Features -bilateral symmetry w/ a pseudocoelom -outer skeleton -they shed as grow -called cuticle -sexual reproduction -segmentation

3 groups -nearly all parasites Hookworms Pinworms Guinea worms

PHYLUM ECHINODERMATA (SPINY SKIN) Features -radial symmetry -water vascular system -internal skeleton of CaCO3 -complete digestive system -regeneration (some) -sexual reproduction

5 classes Class Crinoidea Ex. Feather stars and sea lilies

Class Asteroidea Ex. Sea stars

Class Ophinuroidea Ex. Brittle stars and basket stars

Class Echinoidea Ex. Sea urchins, sand dollars, sea biscuits

Class Holothuroidea Ex. Sea cucumbers