Hydrostatic tension is produced because of the pumping action of the heart, along with the outcome of gravity to the blood within the blood vessels (Scales and Pilsworth, 2008); Phosphorus can be an extracellular fluid https://biobodyboost.co.uk/products/fluid-balance-electrolyte-hormone-water-blend?_pos=1&_psq=fluid&_ss=e&_v=1.0