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14 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Arthropoda
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Metarism with tagmatization, jointed exoskeleton, ventral nervous system
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Sub: Trilobitomorpha
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Biramous appendages, 3 lobes (rami): Head, thorax, abdomen, 1 pair antennae
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Sub: Chelicerata
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Prosoma + Opisthosoma
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Prosoma/ cephalothorax
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Sensory, feeding, locomator tagma
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Chelicerata
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Opisthosoma
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Digestive, reproductive, excretory, respiratory organs
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Posterior to prosoma
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Pedipals
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Sensory; feeding, locomotion, reproduction
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2nd pair
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Chelicerae
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Pincerlike/ chelate, feeding (sucking)
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1st pair
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Characteristics of Athropoda
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Metarism, Chitin exoskeleton,
paired, jointed appendages Growth by ecdysis/ molting, Ventral nervous system, Coelem around excretory organs/ gonads Open circulatory system (hemocoel from blastocoel), complete digestive tract, metamorphosis |
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Epicuticle
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Outer most layer, waxy, impermeable to water, barrier
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Procuticle
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Chitin, sclerotization, calcium carbonate
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Hypodermis
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Secretes exoskeleton, layer of epidermal cells
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Sensilla
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Sensory receptors of exoskeleton, gas exchange
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Hemocoel
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From blastocoel, internal cavity for open circulatory system, exchanges nutrients, wastes, gases
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Carapace over prosoma, telson, book gills
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Merostomata
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Xiphosura - horseshoe crabs
Eurypterida - giant water scorpion |
