• The best-known, such as the medicinal leech, Hirudo medicinalis , are hematophagous , attaching themselves to a host with a sucker and feeding on blood, having first secreted the peptide hirudin to prevent the blood from clotting. (wikipedia.org)
  • The freshwater or amphibious worm-leeches are carnivorous and equipped with a relatively large, toothless mouth to ingest insect larvae, molluscs, and other annelid worms, which are swallowed whole. (wikipedia.org)
  • The phylogenetic tree of the leeches and their annelid relatives is based on molecular analysis (1999) of mitochondrial cytochrome c oxidase . (wikipedia.org)
  • The majority of leeches live in freshwater environments, while some species can be found in terrestrial and marine environments. (wikipedia.org)
  • A minority of leech species are predatory, mostly preying on small invertebrates. (wikipedia.org)
  • Almost 700 species of leech are currently recognised, of which some 100 are marine, 90 terrestrial and the remainder freshwater. (wikipedia.org)
  • Forty-five wood samples (3 species x 2 CCA-C concentrations x 2 water repellent treatments (yes/no) x 3 replicates) + (3 washed samples/species at the 1% CCA-C concentration) were exposed above collection containers, allowing precipitation to contact samples and be collected, while preventing sample submersion in leach water. (thefreedictionary.com)
  • Bloodletting, whether by a physician or by leeches , was based on an ancient system of medicine in which blood and other bodily fluids were regarded as " humours " that had to remain in proper balance to maintain health. (rug.nl)
  • however in invertebrates such as insects or leeches the axon sometimes consists of several regions that function more or less independently of each other. (omicsgroup.org)
  • Leach began his law practice in Lexington, North Carolina, and served in the State house of commons from 1848 to 1858. (wikipedia.org)
  • Surely Leach could have addressed that issue in some manner without taking disciplinary actions against Adam that can't be justified under any circumstances. (thefreedictionary.com)
  • Research published by Cooper and colleagues in the February 2001 issue of the Forest Products Journal demonstrates that certain deck-brightening washes both leach metals from CCA-treated wood and oxidize the trivalent chromium back into the hexavalent form. (thefreedictionary.com)
  • Alongside his wife Jane, Mr Leech was also involved in rigid lens manufacturing when Norcon Laboratories in Newcastle was established, just at the time that soft lenses took off. (thefreedictionary.com)