0.0000001 Grams of immunoglobulin E (IgE)-- the germ - fighting antibody responsible for allergies — in an average liter of blood. (discovermagazine.com)
The average adult has about 4 - 6 liters of blood circulating through his or her body, which makes blood present in almost every part of your body, influencing every reaction of your body. (fitnessandpower.com)
Certainly systemic vasodilation seems a bit of an oxymoron - there are only x liters of blood in the body, and you can't make more blood go EVERYWHERE. (completehumanperformance.com)