The Role of Sleep in Humans and Animals

00:00:01,460Section four. You will hear part of a lecture about the role of sleep in humans and animals. First, you have some time to look at questions thirty-one to forty. 00:00:15,320Now listen carefully and answer questions thirty-one to forty. 00:00:23,020Good morning, everyone. In today's lecture, I'm going to talk about the role of sleep in humans and animals. Of all the biological processes in the animal kingdom, sleep is perhaps the most important. A human can survive for almost two week...