Leech

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Leech

Leech (pronounced: /liːtʃ/) is a type of annelid known for its blood-sucking habits. The term "leech" is derived from the Old English word "laece," which means "physician."

Etymology

The term "leech" comes from the Old English "laece," which is related to the Old High German "laicha" and the Old Norse "lækna," all of which mean "physician." This is likely due to the historical use of leeches in medicine for bloodletting.

Description

Leeches are segmented worms that belong to the phylum Annelida. They are characterized by a long, slimy body and a sucker at each end. They are known for their ability to attach to a host and suck blood, a behavior known as hematophagy.

Medical Use

Historically, leeches have been used in medicine for bloodletting, a practice believed to balance the body's "humors." Today, leeches are used in modern medicine for microsurgery and reconstructive surgery to help reduce swelling and improve circulation.

Related Terms

  • Annelida: The phylum to which leeches belong.
  • Hematophagy: The practice of feeding on blood, as leeches do.
  • Microsurgery: A type of surgery that uses specialized instruments and is often assisted by a microscope. Leeches are sometimes used in this type of surgery.
  • Reconstructive surgery: Surgery that restores form and function to body parts. Leeches can be used in this type of surgery to reduce swelling and improve circulation.

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