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IGHS Winkels

Zoology Chapter 28

TermDefinition
Exoskeleton a tough external covering
Chitin a carbohydrate found in the exoskeleton
Appendages structures such as legs and antennae that extend from the body wall
Tracheal tubes a network of tubes used for breathing
Spiracles small openings located along the side of the body
Book lungs organs tht have layers of respiratory tissue stacked like pages of a book
Malpighian tubules saclike organs that extract wastes from the blood and then add them to feces, or digestive wastes, that move through the gut
Molting the shedding of the entire exoskeleton and the manufacture of a larger one to take its place
Cephalothorax is formed by fusion of the head with the thorax
Thorax lies just behind the head and houses most of the internal organs
Abdomen the posterior part of the body
Carapace part of the exoskeleton that covers the cephalothorax
Mandible a mouthpart adapted for biting and grinding food
Chelipeds the pair of legs that bear large claws which catch, pick up, crush, and cut food
Swimmerets flipperlike appendages used for swimming
Chelicerae mouthparts that contain fangs and are used to stab and paralyze prey
Pedipalps are longer than the chelicerae and are ususally modified to grab prey
Spinnerets organs that contain silk glands
Incomplete metamorphosis the immature forms of insects that undergo gradual metamorphosis
Nymphs these immature forms of insects lack functional sexual organs and other adult structures, such as wings
Complete metamorphosis these animals hatch into larvae that look and act differently than their parents. They feed in completely different ways from adults.
Pupa the state in which an insect changes from larva to an adult
Pheromones specific chemical messengers that affect the behavior or development of other individuals of the same species
Society a group of closely related animals of the same species that work together for the benefit of the whole group
Castes individuals within an insect society that perform particular tasks, or roles
Endoskeleton an internal skeleton that is formed of hardened plates of calcium carbonate
Water vascular system which is filled with fluid, carries out many essential body functions in echinoderms, including respiration, circulation, and movement
Madreporite sievelike structure which opens to the outside of the echinoderm
Tube foot a structure that operates much like a suction cup
Created by: Winkels
 

 



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