Wednesday, September 19, 2007

Vampire bats - facts or fiction?

You've seen vampire bats on your TV screen. Does it really exist, or is it just a mere myths or legend? Believe it or not, vampire bats do exist. There are only three known species in Central and South America.

Vampire bats usually feed on the blood of large birds, cattle, horses, pigs, and sometimes human. However, they do not literally suck blood. The front teeth, lips and tongue are highly specialized, its canine and cheek teeth like a barber's shear to clip away the hairs. Then a piece of skin is removed by the razor-sharp V-shaped front teeth, much like using a spoon to scoop ice cream out of a cup.

During this process, the animal's saliva, which contains an anticoagulant, is released and the resulting wound bleeds freely, enabling the vampire to feed, using its highly specialized lower lip and tongue. The saliva also consist some sort of anesthesia thus its victim cannot feel a thing when it's feeding. The grooves in the lower lip and underside of the tongue form a straw-like structure enabling the bat to suck up the blood rather than lap it. Usually vampire bats will not go for human blood, unless you're camping nearby its inhabitants. Don't be surprise the next morning, you'll find a large wound on your body.

However, the vampire bat may not be as evil as we portrait it. They do have some positive value in medicine. A potent clot-busting substance originally extracted from the saliva of vampire bats are being use as stroke and heart attack medication without increasing the risk for additional brain damage, according to research which appeared in the issue of Stroke: Journal of the American Heart Association.

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2 comments:

Anonymous said...

it is very good facts on vampires for my homework

Anonymous said...

i like cheese and pie