Spider mouthparts. Polarised light micrograph of the chelicerae and pedipalps of a water spider (Argyroneta aquatica). The jointed pedipalps are on both sides of the central two chelicerae, which have jointed fang-like tips (orange-yellow). A duct from the poison gland opens just below the inner ends of the fangs. The chelicerae stab inwards to pierce the prey and then inject poison which kills them. The mouth, below the bases of the chelicerae, then injects saliva with digestive enzymes, which breaks down the inside of the victim. The resulting juices are then sucked up. Magnification: x36 when printed at 10 centimetres across.
October 16th, 2019
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