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 contains a unique carb called inulin, which remains undigested until it reaches the large intestine, where it helps to absorb nutrients better, and cut the risk of colon cancer. Good news for those struggling to manage their blood sugar: asparagus is a rich source of B vitamins, which are known to regulate blood sugar levels.