jointed appendages
segmented body
exoskeleton made of the structural polysaccharide called "chitin"
compound eye with individual units called omatidia
Class Merostomata - horseshoe crab
Class Arachnida - spiders, ticks, scorpions
Class Crustacea - shrimp, crabs, crayfish, barnacles
Class Diplopoda - millipedes (2 pair of walking
legs per body segment)
Class Chilipoda - centipedes (1 pair of walking
legs per body segment)
Class Insecta - insects (3 pair of walking legs)
Lab pictures other images