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 a commonly eaten vegetable in many parts of the world and is well known for its unique, savory taste. Asparagus ranks among the top 20 foods in regards to ANDI score (Aggregate Nutrient Density Index), which measures vitamin, mineral and phytonutrient content in relation to the caloric content. To earn a high ANDI rank, food must provide a high amount of nutrients for a small amount of calories. This MNT Knowledge Center feature is part of a collection of articles on the health benefits of popular foods.