This may be the origin of blue blood as a description of royalty, the skin being so lightly pigmented that the blueness of the veins could be clearly seen.
He has blue blood, which gives his cheeks a blue tinge.
When he casts spells or shapeshifts, he expends magic energythis recovers in time, and can be replenished by drinking the blue blood of ghostly enemies.
One of them is being held captive by guards in dark suits and helmets who bleed blue blood.
However, as she changed back, she's bald and has blue blood veins everywhere in her body.
Lobsters, like snails and spiders, have blue blood due to the presence of haemocyanin which contains copper.
Aristocratic thinkers have postulated that leadership depends on one's blue blood or genes.
Because hemocyanin is blue, these organisms have blue blood, not the red blood found in organisms that rely on hemoglobin for this purpose.
