Bio vocabulary chapter 12

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abdomen
the region posterior to the thorax
antennules
movable sensory appendage;provides balance, provides for weaker sense of taste and touch
antennae
a pair of long, thin feelers on the head of an insect
book lungs
Organs of gas exchange in spiders, consisting of stacked plates contained in an internal chamber.
cephalothorax
a body region composed of the head and thorax fused together
carapace
hard outer covering or case of certain organisms such as arthropods and turtles
chelipeds
first pair of legs in crayfishes that bear large claws that are modified to catch, pick up, crush, and cut food
compound eye
an eye made of many lenses
complete metamorphosis
insect development consisting of four stages: eggs, larva, pupa, adult
exoskeloton
a body covering, made of chitin, provides support and protection
gonad
a gland in which gametes (sex cells) are produced
molt
to shed an outer coveringso it can be replaced by a new one
malpighian tubles
wrap around digestive track of the animal and collect the nitrogen waste, then goes into DS to be removed
incomplete metamorphisis
insect develpomet consisting of 3 stages: egg, nymph, and adult
open ciculatory system
allows blood to flow out of the blood vessels and into various body cavities
simple eye
eye with one lens
swimmerets
small leg-like structures under the tail of the crayfish
statocyst
the organ of balance in a crustacean
tracheas
tubes that connect to spiracles (pores) and internal air sacs. does not need circulatory system
thorax
part of an insect's body that bears the wings and legs
walking legs
help crayfish walk.