7. The vascular lesions caused
by leeches upon the blood
vessels of their host cause
blood naturally to coagulate.
How does the leech solve this
problem since it could be
expected that the ingested
blood would coagulate inside
its body?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Ingested blood does coagulate
inside the (Hirudo medicinalis)
because its saliva there a potent
anticoagulant , a protein
called .

In the past were largely used
medical treatment. Nowadays
therapy is being in patients
with and chronic inflammation
the skin, in againsttissue
necrosis after surgeries and in
others fields of .