Question | Answer |
thorax | middle body region of an arthropod consisting of three fused main segments that may bear legs and wings. |
abdomen | In arthropod, 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 covering. |
molting | In arthropods, the periodic shedding of the protective exoskeleton so their bodies can continue to 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 the some other arthropods, the respiratory structure with highly folded walls whose membranes look like book pages |
spiracle | opening in the arthropod body through which air enters and waste gases leave. |
malpighain tubule | in most arthropods, the waste-excreting structure 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 class to trap and crush food. |
swimmeret | crustacean appendage used as a flipper during swimming. |
chelicera | one of a pair of arachnids 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 structure that spins sild form 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 an insect society that performs specific tasks |