It is a story of the blood of camel.

As one of mammal's characteristics excluding the mechanism of the bone

Rotundly on a no nucleus the red blood corpuscle is given.

The red blood corpuscle is oval in birds and reptiles.

It has the nucleus in that.

However, only the animal of the camel family specially : in the mammal.

It has the red blood corpuscle to be the oval with a no nucleus.

Moreover, though blood does the density adjustment of the body organization liquid to a usual mammal,

the body organization liquid seems to adjust the density of blood to the camel.

Meanwhile, the density of blood is most though it is a camel which can be without drinking water for as much as oneweek.

The reason is never to change.