Complex sentence: The volume of extracellular fluid in an adult male of 70kg, is 20% of body weight--about fourteen litres; eleven litres is interstitial fluid and the remaining three litres is plasma.
Split into simpler sentences: The volume of extracellular fluid in an adult male of 70kg, is 20% of body weight--about fourteen litres. Eleven litres is interstitial fluid and the remaining three litres is plasma.