Extra credit - How are leeches used in medicine

Read the article on how leeches are used in medicine.  http://health.howstuffworks.com/medicine/modern-treatments/leeches-in-modern-medicine.htm

Answer the following questions:  Due Friday by 5pm

1. How are leeches used in medicine?
2. What is unique about how the leeches are able to obtain blood that is helpful to patients?
3. Would you be willing to use a leech as a treatment?  Please explain.
4. What other creepy crawlies can be used for medicine?