"Dangerous little monsters - under the microscope"
Dia-Show Dia 11
Tick head, Magnification factor 170
At the upper side of the eye-less head you can find two pore plates, in each pore is a sense cell, which responds to humidity. With this organ the tick measures the air humidity, dry air is deadly for it.
At the picture the cheliceres are drawn in. That is the normal status.
Idea of the ThinkQuest-Team No. 20510 - Copyright
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