What is hirudo medecinails?

Hirudo medicinalis, commonly known as the European medicinal leech, is a species of leech that has been historically used in medicine for bloodletting and other therapeutic purposes. It is known for its ability to secrete anticoagulants, which can help prevent blood clotting during medical procedures. In modern medicine, it is sometimes used in reconstructive surgery to promote blood circulation and assist in healing. Additionally, its application in therapy has sparked interest in the study of its biological compounds for potential medical uses.