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Ticks are
— they are related to spiders. They have oval, flat bodies and eight legs. After they fill themselves with
, their bodies become spherical. They range in
from the size of a
seed to an apple seed. They latch on to animals and humans by sinking their mouthparts into the
of their victims. Their mouthparts pierce the skin and drink blood for days. Their
contains a mild
. This numbs the bite area, so people often do not feel
. The CDC offers advice for avoiding tick bites. It recommends wearing insect
that contain the ingredient DEET. It also advises wearing long-
shirts, long pants and closed shoes.