Steve5721: Typical values of the density of blood plasma and blood cells are 1025 kg/m^3 and 1125 kg/m^3, respectively.
At 4°C pure water has a density (weight or mass) of about 1 g/cu.cm, 1 g/ml,
1 kg/litre, 1000 kg/cu.m, 1 tonne/cu.m or 62.4 lb/cu.ft
So yes, blood is thicker than water...more dense

I was just about to post something similar, honest!
Sorry Phoenix, your thread has reached a new dimension.