The Heterometrus Indus (asian Forest scorpion)
The Asian Forest Scorpion is commonly found in tropical and subtropical southeastern Asia. They are generally brown or black, and range in size from 100-200 mm in length. Their poison is known to be non-fatal, with an apparent remedy in the original Thai medicine's plant extracts. Their venom causes local pain, mostly inflammation and redness of the skin. The effects of the venom can last from a couple of days to only a few hours. They are popular pets in Asia due to their size, docile behavior and non-lethal venom.
The System
Much like their spider relatives, scorpions have an open circulatory system, with a tube-like heart instead of a heart with different chambers like ours. They have no veins, instead having blood flow into sinuses around their internal organs and back through into their hearts. Their veins flow into their tails as well, allowing their tails to gain nutrients as well for movement and venom.