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Arthropods and Echinoderms
Spiracle
Spiracle definition: A small hole in an insect’s thorax or abdomen for air to enter and leave.
Related Terms
Abdomen
Appendage
Arthropod
Book Lung
Carapace
Caste
Cephalothorax
Chelicerae
Chitin
Chordate
Complete Metamorphosis
Exoskeleton
Incomplete Metamorphosis
Madreporite
Malpighian Tubule
Mandible
Metamorphosis
Molting
Notochord
Nymph
Pedipalp
Pharyngeal Pouch
Pheromone
Pupa
Spinneret
Thorax
Tracheal Tube
Tube Feet
Water Vascular System
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