Phylum Arthropoda. #12 Flashcards
What is to molt?
To shed an old outer covering so that it can be replaced with a new one.
What is an exoskeleton?
A body covering, typically made of chitin, that provides support and protection.
What is a thorax?
The body region between the head and abdomen.
What is the abdomen?
The body region posterior to the thorax.
What is the Cephalothorax?
A body region composed of the head and thorax fused together.
What is a compound eye?
An eye made of many lenses, each with a very limited scope.
What is a simple eye?
An eye with only one lens.
What is an open circulatory system?
A circulatory system that allows the blood to flow out of the blood vessels and into various body cavities so that the cells are in direct contact with the blood.
What are swimmerets?
These aid in swimming as well as reproduction. In male crayfish, the first and second swimmerets transfer sperm to the female during mating. In females, swimmerets carry both the eggs and the developing offspring.
What are walking legs?
These appendages are used for locomotion when the crayfish is on land or moving on the bottom of the lake or river in which it lives.
What are Uropods and telson?
These appendages form the flipper-shaped tail the crayfish uses for swimming.
What are chelipeds?
The chelipeds (usually called “claws”) are used for defense as well as to grab onto prey.
What are antennules?
The small antennae aid the creature in balance and provide taste in touch sensations.
What are antennae?
These longer appendages are much more sensitive than the antennules, providing the crayfish with strong senses of taste in touch.
What is in class Chilopoda?
Centipedes
