Leech Feeding Mechanism Explained

The perfect nature crime which reveals why a leech is

currently eating you and your body is helping it.

Inside its head are three powerful crescent-shaped jaws.

Each jaw is a saw lined with hundreds of razor-sharp jagged teeth.

They move back and forth to saw through your flesh.

Before the real feed begins, the leech injects two special chemicals:

an anesthetic to hide the pain and an anticoagulant called

hirudin that stops your blood from clotting.

Hirudin ensures the blood stays perfectly liquid for easy sucking,

making it one of the most efficient parasite designs in nature.