But to answer your afrocentric question, the different empires each had their own established slave networks and infrastructure in Africa (logistics as has already been stated), see: 1  Arab slave trade. 2  Barbary slave trade. 3  Slavery in the Ottoman Empire.
Asparagus is a vegetable belonging to the lily family, which also includes onions, leeks and garlic. Eat asparagus as part of a heart-healthy diet, as it contains no fat, no cholesterol and very little sodium.
Asparagus is also used for preventing stones in the kidney and bladder and anemia due to folic acid deficiency. Some people apply asparagus directly to the skin for cleaning the face, drying sores, and treating acne. In foods, asparagus spears are eaten as a vegetable. This can produce a pungent odor in the urine. The seed and root extracts of asparagus are used in alcoholic beverages.