Zoology Chapter 14
Terms
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- Arthropoda
- Metarism with tagmatization, jointed exoskeleton, ventral nervous system
- Sub: Trilobitomorpha
- Biramous appendages, 3 lobes (rami): Head, thorax, abdomen, 1 pair antennae
- Sub: Chelicerata
- Prosoma + Opisthosoma
- Prosoma/ cephalothorax
- Sensory, feeding, locomator tagma
- Opisthosoma
- Digestive, reproductive, excretory, respiratory organs
- Pedipals
- Sensory; feeding, locomotion, reproduction
- Chelicerae
- Pincerlike/ chelate, feeding (sucking)
- 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 - Epicuticle
- Outer most layer, waxy, impermeable to water, barrier
- Procuticle
- Chitin, sclerotization, calcium carbonate
- Hypodermis
- Secretes exoskeleton, layer of epidermal cells
- Sensilla
- Sensory receptors of exoskeleton, gas exchange
- Hemocoel
- From blastocoel, internal cavity for open circulatory system, exchanges nutrients, wastes, gases
- Carapace over prosoma, telson, book gills
- Merostomata