The captured Africans were held in forts, sometimes called 'slave castles', along the coast. They remained there for months until finally leaving their homeland for an unknown destination on board European merchant ships, including those of the British Royal African Company.
Key Points. 1  The majority of fluid output occurs from urination. Some fluid is lost through perspiration (part of the body's temperature control mechanism) and as water vapor in expired air. 2  The body's homeostatic control mechanisms ensure that a balance between fluid gain and fluid loss is maintained.
Water intake is obtained from fluid and. food in the diet, and is mostly lost through. urine output. It is also lost through the. skin as sweat, through the respiratory. tract, and in faecal matter (Waugh 2007). Fig 2 shows the normal balance of water. intake and output.