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.
Aside from normal daily water loss in the form of urine, the major source of body water loss is sweat. A person's daily water needs are dependent upon their level of activity and the air temperature. Hotter temperatures and intense exercise increase sweating rates and, as a result, water requirements.