The trans-atlantic trade system had three parts that included question 29 options: raw materials were first sold to africa from europe, then, in the middle passage, slaves were traded to the americas, and then finally manufactured goods were then shipped back to england manufactured goods were first sold to africa from europe, then, in the middle passage, slaves were traded to the americas, and then finally raw materials were then shipped back to england manufactured goods were first sold to asia from the americas, then, in the middle passage, slaves were traded to africa, and then finally raw materials were then shipped back to asia first south america to north america, north america to europe, and then finally europe back to south america