Chapter 36 - Arthropods Flashcards
What are the 3 layers of the chitin?
Waxy outer layer
Middle layer
Inner layer
What is an exoskeleton called?
Chitin
What is the concentration of organs at the anterior end of the body called?
Cephalization
List the five parts of cephalization
Appendages around mouth, antennae, compound eyes, ventral nerve cord, ganglia
How is molting triggered?
Tissues swell, pressure build in exoskeleton and hormones are produced to start molting
What is the common ancestor of Arthropods?
Trilobite
What are segments that are fused into larger structures?
Tegmata
List 4 classes of Arthropods
Trilobita, Crustacea, chelicerata, uniramia
Which class consists of branched antennae and chewing mouth parts called mandibles?
Crustacea
Which class consists of the absence of antennae and pincer like mouthparts?
Chelicerata
Which class consists of appendages that are unbranched?
Uniramia
List four common animals that are Crustacea
Crayfish, lobsters, crabs, barnacles
What are appendages used to filter food out of the water called?
Cirri
What is the larval form of crustaceans called?
Nauplius
What is called when the head and thorax are fused?
Cephalothorax
What is a flat triangular section on tail?
Telson
What removes wastes from blood and removes excess water?
Green gland
What detect position changes?
Statocysts
List most common members of the class Arachnida
Spiders, scorpions, ticks, mites
List 5 different categories that spiders fall into
Orb weavers, con web weavers, sheet weavers, jumping spiders, trap door spiders
List 2 poisonous spiders in the US
Black widow, brown recluse
What are the web secreting glands called?
Spinnerets
What removes wastes in an arachnid?
Coxal gland
In what two ways do spiders differ from scorpions
Pedipalps are modified pincers, large stinger on tail
What is the arachnid “many feet” called?
Myropod
Describe the me characteristics of Arthropods
Jointed appendages, segmented body, exoskeleton, central nervous system
