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spiders and daddy longlegs, mites and ticks, and scorpions (small, insect-like arthropods) (eight legs)
arachnids
how many distinct regions of the body do spiders have?
2
a fused head and thorax
cephalothorax
what kind of eyes do spiders have?
simple eyes
a pair of short appendages; either of two special front legs of a spider that often function as fangs.
chelicerae
spiders that attack only when they are hurt or frightened
black widow, brown recluse, and red widow
have fangs that point inward and move in and out, crossing in the middle
true spiders
have fangs that point down and move up and down
tarantulas
designed for sucking liquids
spider mouth
an appendage that looks like a small leg, is attached to each side of a spider’s mouth
pedipalp
helps the spider cling to walls and ceilings
scopular
the organs that the spider uses to spin silk
spinnerets
hatch inside the silken cocoon and remain inside until the arrival of warm weather
spiderlings
longest-lived of all spiders
tarantulas
(harvestmen) a group of arachnids famous for their long, spindly legs
daddy longlegs
found in most temperate climates and in all tropical climates (can be ovoviviparous and viviparous); has a stinger
scorpions
make up an order of tiny blood-sucking arachnids that parasitize both man and animals
mites and ticks
caterpillar-like creatures
centipedes and millipedes
flattened body, a pair of long, jointed antennae, venomous, a single pair of legs attached to each of its body segments
centipedes
rounded bodies, shorter antennae, harmless, have two pairs of legs per segment
millipedes