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Extracorporeal digestion allocated to predation in arachnids

How extracorporeal digestion allocated to predation in the arachnids?

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Arachnids can immunize poison to kill or paralyze their praise using structures which is chelicerae. The prey is incompletely digested outside body of arachnid by digestive enzymes immunized together with venom or injected posterior. After this extracorporeal digestion food is ingested and gains digestive tube of predator where extracellular digestion continues.

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