The hard, skeletal, outer covering that is common to all arthropods.
What is the exoskeleton?
100
An organ that allows the crayfish to absorb oxygen from the water.
What are the gills?
100
The substance spiders use to make the various types of webs, traps, and other instruments they use for catching food, traveling, or anchoring.
What is silk?
100
The first stage of an insect's life, regardless of its type of metamorphosis.
What is the egg stage?
100
The type of wings found in order hymenoptera, the order to which ants belong.
What are membranous wings?
200
The process of shedding an old outer covering so it can be replaced with a new one.
What is molting?
200
A stationary crustacean which lives in a calcium shell and can be found attached to many things, including whales!
What are barnacles?
200
The number LEG PAIRS that arachnids have, which sets them apart from other arthropods.
What is four pairs?
200
The type of wings found on butterflies and moths, which seems to rub off like a powder.
What are scaled wings?
200
The mass of tissue we observed just behind the eyes of our dissected crayfish that was connected to the eyes by nervous tissue.
What is the brain ganglia?
300
A system designed to transport blood to the upper part of the body, only to release it out of the blood vessels and allow it to flow down over the organs and cavities of the body.
What is an open circulatory system?
300
A nerve cord that runs along the "belly" of a crayfish (and most other arthropods; which is why they so carefully protect their "bellies").
What is the ventral nerve cord?
300
This organism does not really have a thousand legs as its name suggests - rather, it has 2 pairs of legs per body segment.
What is a millipede?
300
While some arthropods have more of these, and others have none, insects always have two (or one pair).
What are antennae?
300
An eye made of many lenses, each of which has a very limited scope.
What is a compound eye?
400
A body segment found in some arthropods that is a combination of the head and the thorax; arthropods with this type of body segment will only have 2 segments total.
What is the cephalothorax?
400
A passageway that connects the mouth with the stomach in most creatures, which we saw in the crayfish.
What is the esophagus?
400
The organs in spiders that contain many very thin layers of tissue in a chamber that opens to the outside through a spiracle, and allows the exchange of oxygen and carbon dioxide.
What are book lungs?
400
Interconnecting tubes in an insect that allow for free passage of air through the body, eliminating the need for a respiratory system.
What are tracheas?
400
The level of classification to which belong crustacea, arachnida, and insecta.
What is Class?
500
An attribute of all arthropods that is hinted at by the meaning of the very word "arthropoda", which allows them to move and grasp things with ease.
What is jointed appendages?
500
The "jaws" of a crayfish, which open from side to side, rather than up and down like a human jaw.
What are the mandibles?
500
The class to which centipedes, the poisonous predators, belong.
What is chilopoda?
500
A stage of incomplete metamorphosis where an insect looks like a miniature version of an adult, but usually lacks wings and reproductive organs.
What is the nymph stage?
500
The casing which the larva of a butterfly will form to enter the "pupa" stage.