worm videos
The Bite That Cures: Leeches Sucking
Recommend
On the Learning Channel's "The Bite that Cures," we learn that when a leech sucks an animal's blood, it emits a mild anesthetic which makes the wound painless. In addition, the leech injects an... (more info)

On the Learning Channel's "The Bite that Cures," we learn that when a leech sucks an animal's blood, it emits a mild anesthetic which makes the wound painless. In addition, the leech injects an anti-coagulant which disables blood clotting.

Related Article: Learn more about worms.

most watched: worm videos