e-tool of zoology

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Phylum Arthropoda Phylum Mollusca Phylum
Echinodermata
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ARTHROPODA
These are triploblastic,bilaterally symetrical,
metamerically segmented animals
Body is covered by a thick chitinous cuticle
forming an exoskeleton.
Body segments have jointed legs.
Distinct cephalization.
The Head has a pair of compound eyes. Each
compound eye is made up of Several sub-units
called Ommatidia
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ARTHROPODA
Presence of open circulatory system
The Body cavity is filled with blood. It is
called Haemocoel.
They exhibit sexual dimorphism.
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PRAWN
CRUSTACEA
CENTIPEDE
MYRIOPODA
COCKROACH
INSECTA
ARTHROPODA
SPIDER
ARACHINIDA
PERIPATUS
ONYCHOPHORA
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PRAWN
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LOBSTER
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MILLIPEDE
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CENTIPEDE
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COCKROACH
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SPIDER
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PERIPATUS
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MOLLUSCA

• These are soft bodied animals without
  segmentation.
• The body is divided into head, muscular foot and
  visceral mass.
• The body is covered by a mantle and a shell.
• Respiration is effected by gills.

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SNAIL
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MUSSELS
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SEPIA
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octopus
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ECHINODERMATA

• They are Marine organism.
• The Adults are radially symmetrical but the larva
  shows bilateral symmetrical.
• Presence of water vascular system.
• Locomotion is effected by tube feet.
• The body surface has several spines.

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STAR FISH
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SEA CUCUMBER
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BRITTLE STAR
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Star Fish
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