Bilateral SymmetryBilateral Symmetry- body can be dividedinto two identical halves1/21/2
Bilateral Symmetry • Bilateral Symmetry- body can be divided into two identical halves
Jointed Appendages Jointed Appendages- each segment mayhave one pair of appendages, such as:legswings mouthpartsJointedAppendage
Jointed Appendages • Jointed Appendages- each segment may have one pair of appendages, such as: • legs • wings • mouthparts
Open Circulatory System: Open Circulatory System- blood washesover organs and is not entirely closed byblood vessels. Our system is a closed oneCirculatory SystemAccessoryPulsatileOrganHeartAorta
Open Circulatory System • Open Circulatory System- blood washes over organs and is not entirely closed by blood vessels. Our system is a closed one
Life cycle:The life cycle of arthropods is divided into two maintypes:1. Incomplete metamorphosis:Egg → Nymph → Adult.(Arachnid type: EggLarvaNymph → Adult)2.Complete metamorphosissEgg → Larva → Pupa → Adult
Life cycle: The life cycle of arthropods is divided into two main types: 1. Incomplete metamorphosis: Egg → Nymph → Adult. (Arachnid type: Egg→Larva→Nymph → Adult). 2. Complete metamorphosis: Egg → Larva → Pupa → Adult
Five classes ofArthropod have medicalClassificationimportantInsecta:mosquito,fly,sandfly,flea,louce,cockroach, etcArachnid:ticks,mites,spiders,etcCrustacea:crab, shrimp,cyclops,copepod,etcChilopoda（唇足纲）：centipede（蜈）Diplopoda（倍足纲）：millipede（马陆）