In the natural world, drugs can be obtained from a wide variety of sources. The simple leech secretes a substance called hirudin, an anticoagulant to keep blood flowing from a wound while it feeds. In this live demonstration of leeching, discover the beliefs behind the ancient practice of phlebotomy – and why leeches are still in use in medicine today!
Old Operating Theatre, Museum and Herb Garret
9a St Thomas Street, SE1 9RY
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£6; conc £5; child £3.50; family (2+4) £13.90
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