Medicinal leeches _ Hirudo medicinalis _ normally make their home in fresh water.
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Leeches, such as the " Hirudo medicinalis ", have been historically used in medicine to remove blood from patients.
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He gave his name to the 60 micrometer-diameter Retzius cells in the central nervous system of the leech ( " Hirudo medicinalis " ).
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Only one of the world's 650 species qualifies : The Hirudo Medicinalis, a specialist sporting 300 tiny teeth laid out in the shape of a Mercedes hood ornament.
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In " Hirudo medicinalis ", these supplementary factors are produced by an obligatory symbiotic relationship with two bacterial species, " Aeromonas veronii " and a still-uncharacterized " Rikenella " species.
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Their most well-known member is the European medical leech, " Hirudo medicinalis ", and indeed most of the blood-sucking " worms " as which leeches are generally perceived belong to this group.
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His knowledge of neural biology and electronic engineering allows him to physically combine the neurons of a leech _ officially known as Hirudo medicinalis, a species commonly found in Eastern Europe _ with electronics.
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Hirudo medicinalis, the European medicinal leech, is a 4-inch-long carnivorous, hermaphroditic, segmented worm with a sucker on each end, five pairs of eyes, and 32 nerve bundles, or " brains, " in the middle.
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Neurons functionally specialized for nociception have been documented in other invertebrates including the leech " Hirudo medicinalis ", the nematode " Caenorhabditis elegans " and the molluscs " Aplysia californica " and " Cepaea nemoralis ".
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The medicinal leech ( " Hirudo medicinalis " ) has two suckers, one at each end, called the anterior and leverage while the anterior sucker, consisting of the jaw and teeth, is where the feeding takes place.