Digestive System: Evolution & Classification
Biology - Section 3
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Mollusca (Gentilella)
Clam
Octopus
Snail
Porifera (Gentilella)
Calcarea
Hexactinellida
Demospongiae
Cnidaria (Gentilella)
Coral
Jellyfish
Sea Anemone
Platyhelminthes (Theodore)
Trematoda
Cestoda
Turbellaria
Nematoda (Theodore)
Ancylostoma duodenale (Hookworms)
Trichuris Trichiura
Pinworms
Annelida (Theodore)
Earthworms
Leeches
Polychaetes
Arthropods (Edwards)
Spider
Scorpion
Butterfly
Echinodermata (Edwards)
Sea Star
Sea Urchin
Sand Dollar
Chordata (Edwards)
Tiger
Lion
Horse
Arthropods
Facts about Arthropods
Have segmented bodies
Have an
exoskeleton
Undergo a transformation called metamorphosis
Have an open circulatory system
When Arthropods grow they must molt there exoskeleton