Coconut water can be used (in emergencies) as a substitute for blood plasma.

[RBCal]

From Listverse which posts interesting "facts".

The reason for this is that coconut water (the water found in coconuts - not to be confused with coconut milk, which comes from the flesh of the coconut) is sterile and has an ideal pH level. Coconut water is liquid endosperm - it surrounds the embryo and provides nutrition.

Coconut Plasma