Chapter 29.1, 29.2 Flashcards
What is an appendage?
A structure that extends from the arthropod’s body wall
What are the three regions of an arthropod from the front?
Head, thorax, abdomen
What is is called when the first two sections are fused?
Cephalothorax
What is an exoskeleton and what is it made of?
A rigid outer layer, composed of chitin
What is a trachea?
One of a network of fine tubes that an arthropod breathes through
What kind of circulatory system do arthropods have?
Open
What are Malpighian tubules?
Structures used for excretion
What kind of eye do most arthropods have and what is it good at?
Compound- movement
How do most arthropods reproduce?
Sexually
Where does most arthropods reproduction take place?
Internally
What is molting?
The process of periodically shedding an exoskeleton so that a larger body can be grown
Name the four subphylum of arthropods and give an example of each.
Hexapoda-insects
Myriapoda- millipedes (centipedes)
Crustacea- lobster (shrimp)
Chelicerata- spider (scorpion, mite, tick, horseshoe crab)
What are the three main reasons arthropods are so successful?
Exoskeleton allows them to adapt to life on land, they are small, they are adapted to a wide variety of food and habitats
Name the five main members of the subphylum chelicerata.
Spiders, scorpions, mites, ticks, horseshoe crabs
What are the three characteristics of arthropods?
Segmented body, jointed appendages, hard external skeleton
What is the name for the appendages of spiders used for feeding?
Chelicerae
What is the name for the appendages of spiders used for holding prey?
Pedipalps
How do arachnids get their food?
Carnivores
What is the effect of the lack of jaws of arachnids?
They can only eat liquid food
What are the two species of poisonous spiders in the us?
Black widow, brown reculse
What are spinnerets?
Appendages that secrete silk
What organism spreads lyme?
Deer ticks
What two sections are crustaceans made of?
Cephalothorax, abdomen
What is the feeding appendage of a crustacean called?
Mandible
How many antennae do crustaceans have?
Two
How do crustaceans breathe?
Gills
What is the larval form of a crustacean?
Nauplius
How many pairs of legs do decapods have?
5
What is a cheliped?
The claw of a crustacean
