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.
Blood and glucose are not normally found in urine. Key Terms. urine: A liquid excrement consisting of water, salts, and urea, which is made in the kidneys then released through the urethra. glomerulus: A small, intertwined group of capillaries within nephrons of the kidney that filter the blood to make urine. Urine is a waste byproduct formed from excess water and metabolic waste molecules during the process of renal system filtration.