# of chromosomes
![Picture](/uploads/1/7/9/4/17948919/9775452.png?94)
-All three species were found to have different haploid chromosome numbers:
H. medicinalis 14, H. verbana 13, and H. orientalis 12.
-These days, leeches are used to help heal skin grafts -- the process for treating burns in which blood tissue is transferred from one part of the body to another -- by removing blood pooled under the graft and restoring blood circulation in blocked veins.
H. medicinalis 14, H. verbana 13, and H. orientalis 12.
-These days, leeches are used to help heal skin grafts -- the process for treating burns in which blood tissue is transferred from one part of the body to another -- by removing blood pooled under the graft and restoring blood circulation in blocked veins.
Uses of the leech (Hirudo medicinalis)
This Leech is used for medicinal purposes. Medicinal leeches are now making a comeback in microsurgery. They provide an effective means to reduce blood coagulation, to relieve venous pressure from pooling blood (venous insufficiency), and in reconstructive surgery to stimulate circulation in reattachment operations for organs with critical blood flow, such as eyelids, fingers, and ears.