How many leeches does it take to kill you?
Online Answer
The numbers on that work out pretty simply. The average human adult has about 4.5 to 5.5 litres of blood, and leeches suck about 5-15 ml in one session.
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People have been using salt for ages to preserve food because of its ability to draw water out of cell membranes. This is why salt is so damaging to leeches. Leeches' skin, like slugs, is permeable. ... That's why salt is so effective at killing leeches..
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The numbers on that work out pretty simply. The average human adult has about 4.5 to 5.5 litres of blood, and leeches suck about 5-15 ml in one session.
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