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15 Cards in this Set

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  • Back
What are the three main characteristics of arthropods?
exoskeleton, segmented body, and jointed appendages
How do arthropods move?
jointed appendages; such as walking legs. Most appendages are modified for swimming. Many insects have wings and can fly.
How are arthropods protected and supported?
have an exoskeleton; muscles attach from the inside. The exoskeleton must be shed and replaced from time to time to allow for growth. called molting.
How do arthropods reproduce?
They reproduce sexually. have male and female organs in their body. Have internal fertilization.
Describe the circulatory system of arthropods.
The circulatory system is "open." Blood is pumped by a heart through open spaces in its body.
Describe the respiratory system of arthropods.
Gas exchange between oxygen and carbon dioxide. It occurs by way of gills or book lungs and special air tubes.
What are the 5 major groups of arthropods?
crustaceans, arachnids, centipedes, millipedes, and insects
Describe crustaceans.
has two or three body sections
three pair of appendages for chewing
5 or more pairs of legs
two large antennae
has a pair of legas attached to each body segment
breathes through gills in every type of water
Give several examples of crustaceans
crabs, shrimp, crayfish, lobster,barnacles
Describe centipedes and millipedes.
body divided into many segments, have one or two pairs of legs attached to each segment, have antennae
Describe arachnids and their relatives.
has only two body sections. The first section is a combined head and chest. The last section is call the abdomen. have four pairs of legs, no antennae, breathe with organs called book lungs or tiny tubes.
Give some examples of arachnids.
spiders, mites, ticks, scorpions
Describe the arthropods called insects.
many have wings, many have antennae, body is divided into three segments and have three pairs of legs.
What are the three body regions of insects?
head, thorax, and abdomen
How do insects protect themselves?
A hard exoskeleton protects them.
Many can run quicly or fly away from danger.
Some smell or taste bad to predators.
Some stings
Many use camouflage, or protective coloration in which the insect blends with its surroundings so it is nearly invisible to a predator. Some resemble different animals such as spots on wings resemble large eyes.