Watch the below videos to answer questions regarding your topic. Your answers must be thorough and include specific detail and diagrams. DO NOT write down information you don’t understand. If need be, research the topic further using your textbook or the world wide web!

Link 1: https://www.youtube.com/watch?v=njGz69B_pUg&feature=youtu.be

Link 2: http://www.youtube.com/watch?v=gmwgJ6bDLHM&safe=active
Link 3: http://www.youtube.com/watch?v=4Gymoej6N2A&safe=active