Leech Data:
There are 650 known species of leeches.
The largest leech discovered measured 18 inches.
Approximately one fifth of leech species live in the sea, where they feed on fish.
The leech has 32 brains - 31 more than a human being.
Hirudo leech lays its babies within a cocoon, while the Amazon leech carries its baby on its stomach - sometimes up to 300.
Not all leeches are bloodsuckers. Many are predators that feed on earthworms, etc.
The Amazon leech uses a different method of sucking blood. It inserts a long proboscis into the victim instead of biting.
The bite of a leech is painless due to its own anesthetic.
Hirudo leech injects an anti-coagulant in the victim to prevent clotting of blood.
The leech gorge yourself until you've had your fill and then just fall off.
The leech gorge itself up to five times their body weight.
The leech was first used in medicine about 1000 BC, probably in ancient India.
In the past, people stood in lakes and pools around the country and when the leeches attached to his legs that would put them in baskets and sell them. Today the Hirudo leech is an endangered species.
Barbers and surgeons who used leeches original to cure anything from headaches to gout!
The leech nervous system is very similar to the human nervous system and is of great benefit to researchers in their search for answers to human problems.
The closest relatives of leeches are earthworms.
Leeches can bite through a hippopotamus hide!