Bee sting, SEM

Bee sting, SEM

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Caption: Bee sting. Coloured scanning electron micrograph (SEM) of the end of the needle-like sting of a honeybee, tipped with blood. The sting is a modification of the female ovipositor, or egg- laying apparatus. It is no longer used to lay eggs, but instead serves as a weapon of defence. The sting consists of moveable chitinous elements, into which the ducts of two glands open. When a bee stings, the contents of the alkaline gland are mixed with the contents of the acid gland producing poison. The tip is armed with backward- sloping barbs, which makes it difficult to remove intact. The action of stinging kills the bee. Magnification unknown.

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Keywords: animal, bee sting, bees, coloured, horizontal, hymenoptera, hymenopteran, insect, insecta, invertebrate, invertebrates, nature, ovipositor, scanning electron micrograph, sem, wildlife, zoology

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