Leeches
Leeches
Leeches (/ˈliːtʃɪz/) are a group of parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are particularly known for their role in medicine throughout history.
Etymology
The term "leech" comes from the Old English lyce, which is of Germanic origin. It is related to the Middle Dutch liek and the Old Norse lik, both meaning "body".
Description
Leeches are typically characterized by a cylindrical body shape and a small sucker, which contains the mouth, at the anterior end. They are known for their ability to extend their bodies when they move. Most leeches are hematophagous, meaning they feed on the blood of their hosts.
Medical Use
In medicine, leeches have been used for centuries for bloodletting, a practice believed to balance the body's "humors". Today, they are used in microsurgery and other fields for their anticoagulant properties, which can help prevent blood clots and stimulate blood flow in areas with poor circulation.
Related Terms
- Hirudotherapy: The medicinal use of leeches.
- Hematophagy: The practice of certain animals feeding on blood.
- Bloodletting: The withdrawal of blood from a patient to cure or prevent illness and disease.
- Microsurgery: A general term for surgery requiring an operating microscope.
External links
- Medical encyclopedia article on Leeches
- Wikipedia's article - Leeches
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