... after losing almost 40% of their body mass, the camel can drink >50 L, and the sudden change in osmolality would rupture/pop another mammal's RBCs. The camelid RBC are uniquely adapted to handle sudden swings in water intake.

But there's more! Camelids are the only mammal with blood that behaves very nearly like an "ideal fluid", with a non-viscous flow more like water than blood. It's suggested this helps to rapidly wash out lactate from exertion & dehydration. www.ncbi.nlm.nih.gov/pmc/articles...

Near-Newtonian Blood Behavior – Is It Good to Be a Camel?

From a certain level of exercise-intensity onward, hematocrit increases in horses, which brings more oxygen carriers into the bloodstream. Camels, however, when used in competitive racing could be eve...