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39 Cards in this Set
- Front
- Back
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What does Arthropods mean |
Joint footed |
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When did Arthropoda arrive |
500 million years ago |
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How many animals living today are arthropods |
2 of 3 |
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Where do Arthropods live |
Freshwater, salt water, air and land |
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What are the common characteristics |
Segmented, coelomates, bilateral symmetry, exoskeleton, jointed appendages |
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What is the exoskeleton made out of |
Protein and chitin |
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Why do land species have waxy exoskeleton |
To reduce water lose |
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What do exoskeletons do |
Molt with a new one forming beneath by chitin- secreting cells |
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What is swallowed before new exoskeleton hardens |
Air or water to allow room to grow |
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How many times to Arthropoda molt |
4-7 times a year |
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Why are Arthropods vulnerable to predators |
There exoskeleton isn’t harden |
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What are the three body sections |
Head, thorax, and abdomen and some can be fused together |
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How do water Arthropods respirate |
Gills |
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How do land Arthropods respirate |
Tracheal tubes and book lungs |
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How do tracheal tubes work |
Insects have these and it’s branching network of hollow air passages with spiracles ( openings) |
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How do book lungs works |
Spiders have these and they are air filled chambers with leaf like plates |
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Antennae are blank |
Sensitive and pheromones are often used |
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How many eyes do Arthropoda have |
One pair of large compound eyes and 3-8 simple eyes |
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What is the nervous system |
Well developed with brain |
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How many hearts |
One or more hearts |
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What type of circulatory system |
Open |
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What does Arthropods mouth have |
Jaws ( mandibles ) |
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What type of reproduction |
Usually separate males and females |
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What is partheno-genesis |
Ants, bees and wasp exhibit this asexual reproduction in which unfertilized eggs develop |
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5 groups |
Arachnids, crustaceans, centipedes/ millipedes, hotshot crabs and insects |
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Examples of arachnids |
Spiders , scorpions, notes and ticks |
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How many jointed appendages and legs do arachnids have |
12 JA and 8 legs |
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Spider characteristics |
No mandibles but have fangs so they use extra cellular digestion to liquefy prey, no antennae and silk spinnerets at rear |
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Crustacean examples |
Crabs, lobsters, shrimps, crayfish, barnacles, water fleas, and pill bugs |
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Crustacean characteristics |
Aquatic, 4 antennae, mandibles, compound eyes, 10 legs ( claws) |
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Crustacean characteristics |
Aquatic, 4 antennae, mandibles, compound eyes, 10 legs ( claws) |
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Centipedes |
One pair of legs per segment, poisonous bite, carnivorous |
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Crustacean characteristics |
Aquatic, 4 antennae, mandibles, compound eyes, 10 legs ( claws) |
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Centipedes |
One pair of legs per segment, poisonous bite, carnivorous |
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Millipede |
Two pair of legs per segment, don’t bite, herbivores |
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Horseshoe crab |
Unchanged for 500 million years, oldest arthropod |
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Insects |
6 appendages used as mouth parts ( including mandibles) 6 legs |
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Insects |
6 appendages used as mouth parts ( including mandibles) 6 legs |
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What does insectum mean |
Botched or divided into 3 parts |
