Exam 4.1 Flashcards
Arthropoda Groups
Chelicerata, Myriapoda, Crustacea, Hexapoda
Tagmata
Many segments fused together
Functional group
Basic Arthropod characteristics
Triploblastic
Protostomes
Eucoelomates
Open circ. system with hemocoel
Pros of exoskeleton (4)
Hard for protection
Lightweight and made of chitin
Prevents desiccation (drying out)
Muscles attach to it
Cons of exoskeleton (1)
Ecdysis for growth
Tracheal System
Air sent directly to cells via tube system with multiple openings and trachea
Can open and close tubes to prevent water loss
Arthropoda
Chelicerata characteristics
4 pr walking legs
1 pr pedipalps
1 pair chelicera
Chelicera
Appendages near mouth
Can have fangs (spiders)
Chelicerata Classes
Merostomata, Pycnogonida, Arachnida
Arachnida Groups
Spiders, scorpions, Harvestmen, ticks and mites
Arachnida Tagmata
cephalothorax and abdomen
Book Lungs
Air pockets extending into blood chamber
Spiders
Sensory structures in spiders
8 eyes, good at detecting movement Sensory setae (tactile receptors on body)
Myriopoda Groups
Chilopoda, Diplopoda
Head of Crustaceans have…
2 pairs of antennae
1 pair of mandibles (chewing)
2 pair of maxillae (food manipulation)
First stage of life cycle of crustaceans
Nauplius
Malacostraca
Isopod, krill, decapods (lobster, crayfish, shrimp)
Crustacea
Tagmata in Insecta
- Head-sensory and feeding
- Thorax- locomotion
- Abdomen-digestion, excretion, reproduction