There are articles dealing with heart and circulatory physiology, renal physiology, lung physiology, but one of the articles that caught my eye was one dealing with vitamin C and smoking. This interested me because I know a lot of smokers and smoke-related topics interest me. This website is dealing with sleep physiology. I found an article that stated facts about the time an animal sleeps and all the factors that play a part in their sleeping habits. I never knew all the sleepinghabits, sleeping places, and sleeping positions thatcould exist.
Some animals sleep with their eyes open.
Some sleep underwater while swimming. Some can even sleep with one half of their brain at a time. Others sleep standing up. Sleep patterns are also determined by whether or not an animal is the prey of predator. Body size also plays a part in the number of hours slept.