Conversation so far:
where do you find interstitial fluid in the human body
Interstitial fluid is the body fluid between blood vessels and cells.
what does interstitial fluid contain
Interstitial fluid consists of a water solvent containing sugars, salts, fatty acids, amino acids, coenzymes, hormones, neurotransmitters, white blood cells and cell waste-products.
is interstitial fluid identical to plasma
Plasma and interstitial fluid are very similar because water, ions, and small solutes are continuously exchanged between them across the walls of capillaries, through pores and capillary clefts.
when is interstitial fluid considered lymph
Interstitial fluid that enters the lymphatic system through lymph capillaries in the interstitial spaces is called lymph.

Question: how much of the body's total water is the fluid
Self-contained rewrite: how much of the body's total water is interstitial fluid