[1] In lean healthy adult men, the total body water is about 60% (60–67%) of the total body weight; it is usually slightly lower in women (52–55%).
A lean 70 kg (150 lb) man, for example, has about 42 (42–47) liters of water in his body.
The total body of water is divided into fluid compartments,[1] between the intracellular fluid compartment (also called space, or volume) and the extracellular fluid (ECF) compartment (space, volume) in a two-to-one ratio: 28 (28–32) liters are inside cells and 14 (14–15) liters are outside cells.
[5] Clinical samples are generally defined as non-infectious human or animal materials including blood, saliva, excreta, body tissue and tissue fluids, and also FDA-approved pharmaceuticals that are blood products.
[7] In medical contexts, it is a specimen taken for diagnostic examination or evaluation, and for identification of disease or condition.