click below
click below
Normal Size Small Size show me how
Chapter 26 Vocab b.2
vocab
| Term | Definition |
|---|---|
| Thorax | Middle body region of an arthropod consisting of three fused main segments that may bear legs and wings |
| Abdomen | In arthropods, posterior body region of an arthropod that contains fused segments, digestive structures, reproductive organs, and bears additional legs; in humans, part of body that is between the diaphragm and pelvis |
| Cephalothorax | In arthropods, the structure formed from the thorax region fused with the head |
| Appendage | In arthropods, a structure such as a leg or an antenna that grows and extends from the outside body coverings |
| Molting | In arthropods, the periodic shedding of the protective exoskeleton so their bodies can continue ot grow |
| Mandible | In most arthropods, one of a pair of mouthparts adapted for biting and chewing food |
| Tracheal Tube | In most terrestrial arthropods, one of a system of tubes that branch into smaller tubules and carry oxygen throughout the body |
| Book Lung | In spiders and some other arthropods, the respiratory structures with highly folded walls whose membranes look like book pages |
| Spiracle | Opening in the arthropod body through which air enters and waste gases leave |
| Malpighian Tubule | In most arthropods, the waste-excreting structures that also helps maintain homeostatic water balance |
| Pheromone | Chemical secreted by an animal species to influence the behavior of other members of the same species |
| Cheliped | In most crustaceans, the first pair of legs, which has large claws to trap and crush food |
| Swimmeret | Crustacean appendage used as a flipper during swimming |
| Chelicera | One of a pair of arachnid appendages modified to function as fangs or pincers |
| Pedipalp | One of a pair of arachnid appendages used for sensing and holding prey and in male spiders used for reproduction |
| Spinneret | In spiders, the structures that spins silk from a fluid protein secreted by their glands |
| Metamorphosis | In most insects, the series of changes from a larval form to an adult form |
| Pupa | Non feeding stage of complete metamorphosis in which the insect changes from the larval form to the adult form |
| Nymph | Immature form of an insect during incomplete metamorphosis- the hatchling looks like a small adult insect and goes through several molts, eventually becoming a mature winged adult |
| Caste | Specialized group of individuals in a n insect society that performs specific tasks |