Blue Blood

When you speaks of blue blood..people always assumes it comes from aliens/monsters.
Or just avatar~ lols.. Came across this show named: blueblood ..so i thought of writing this post
Truth is..when you speaks of blue blood..i think of horse-shoe crabs~
Yes. horse shoes crab have blue blood because their blood is copper-based..
While most of our mammals blood are iron-based..which makes them red..
Iron-based blood are more efficient in carrying oxygen i suppose..

Anws..extraction of their blood is to drain it straight from their heart..
Sounds curel, but they'll survive with 2/3 of their blood left..lols..
thought there's a 10+% mortaility rate~
Their blood cost bout $15,000 per 1 qt..

Which is use to test for medical products for to test for bacteria which can be fatal to humans..
In short, be thanksful to horseshoe crab the next time you take a vaccine..
Their blood are the one that actually saved your life~