Definition. Rickets (in children) and osteomalacia (in adults) are two forms of a metabolic bone disease resulting from vitamin D deficiency. Both cause softening and weakening of bones because of defective or inadequate bone mineralization. Rickets. Copyright Â© Nucleus Medical Media, Inc.
The flow from west to east: Disease. In terms of diseases, the Columbian Exchange was a wildly unequal affair, and the Americas got the worst of it. The flow of disease from the Americas eastward into Eurasia and Africa was either trivial or consisted of a single important infection.
Naksan-Some of the exchanges of the Columbian Exchange were the horses, potatoes, tomatoes, corn, pepper, eggplant, sheep, llamas, alpacas, guinea pigs, pigs, turkeys, chocol â¦ ate, peanuts, pumpkins, squash, grapes, lettuce, pinapples, pears, peaches, cocao, rice,tobacco, sweet potatoes, and beans.