Monday, August 19, 2019

 An outstanding shot of a human body 
blood vessels perfectly aligned
These are the blood vessels in the finger. 
This is why we bleed when we cut our fingers even a little

Who can donate blood to whom
 Red Blood Cell Compatibility Table


  1. Mrs J believes that to be true. She's O- I'm A+. If we sit on the porch in the evening, she usually comes in with several bites. I rarely get bitten.

    Now, that's some scientific proof right there. I'll work on global warming next.