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.
First is the amazing B-vitamin content of asparagus. In our food rating system, asparagus emerges as an excellent source of folic acid, vitamin B1, and vitamin B2 as well as a very good source of niacin, choline, vitamin B6, and pantothenic acid.