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Phylum Arthropoda
Monday 12 September 2016 • 23:32 • 0 comments
Phylum Arthropoda
Unique characteristics of Phylum Arthropoda :
Level of organisation : Organ system
Body Plan : Bilateral symmetry
Germ Layers : Triploblastic
Segmentation : Segmented
Body Cavity : Coelomate
Cephalization
- Head , thorax and abdomen
- Thorax fuse with head to form cephalothorax
- Exoskeleton with chitin
Homocoel (blood cavity)
- filled with hemolymph (blood-like fluid)
- have artery but no vein
Complete digestive system
Modified mouth parts & anus
Nervous system consisting of :
- Double cerebral ganglion
- Double ventral nerve cord network of nerve
Habitat
- air , land , fresh water , salt water, parasitic
Class Crustacea
( Giantfreshwater prawn, Macrobracium sp.)
Class Chilopoda
( Centipede, Scolopendra sp. )
Class Diplopoda
( Millipede, Julus sp . )
Class Insecta
(Grasshopper, Valanga sp. )
Class Arachnida
( Spider , Nephila sp.)
Class Merostomata
( Horseshoe crab , Tachypleus sp. )
 The Phylum
Phylum in Kingdom Animalia
        
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