Talk:The Ark/@comment-26247132-20150706043423/@comment-26247132-20150706060123

From this tumblr post from the Writer's Room:

"Also, even though you didn’t ask, others have, and all of the Ark residents are the same blood type, Type O (the universal donor blood type). This is fairly easy for them to engineer genetically (and many technologies are being developed today to make blood typing irrelevant for blood donation / transfusion).

This would be why Jasper could easily filter Maya’s blood through his system without any issues…"