Arthropods Flashcards
arthropod
phylum of animals with a segmented body, jointed limbs, and usually a shell that undergoes moltings
molting
shedding a shell to make room for growth
pheromones
chemical substance produced by animals that serves as a stimulus for other individuals
thorax
holds the ribcage, heart, and lungs; between the abdomen and the head
abdomen
the posterior section, after the thorax
cephalothorax
head and thorax fused together
exoskeleton
outside skeleton/shell that protects the body
cheliped
a pair of legs bearing a chela, or claw
malpighean tubes
excretory tubes in some arthropods
arachnid
has four pairs of segmented legs and a body with two regions (ex: spiders, scorpions, ticks)
metamorphosis
physical change in structure after hatching or birth (ex: tadpole becoming a frog)
crustaceans
mostly aquatic arthropods with a hard shell, pair of appendages on each segment, and two pairs of antennae (ex: lobsters, shrimp, crabs, barnacles)
insects
small arthropods with three pairs of legs, usually two pairs of wings, and a body divided into three segments
antennae
paired appendages used for sensing
swimmerets
abdominal appendages specialized for swimming and carrying eggs
