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.
1 Urinary - water regulation by the kidneys, with excess fluid excreted into the urine being estimated at 500-1,000 mL per day. 2  Respiratory - water lost from the lungs as we breathe out, about 250-350 mL per day.  Fecal - excreted in our solid waste, estimated at 100-200 mL per day.