1. The Brain
The brain is that organ that keeps you alive. This controls all your senses and bodily functions. However, many believe computations, decisions and daily interactions with others will require more brainwork than mere sleeping at night. This can be partially true as you require deep thinking to make a good decision. But it is also a fact that when the brain retires at night, it is more active. This is the reason why people tend to have 2 to 3 seconds of pleasant dreams.
These are some facts that can happen to a human body. You can still learn more so you can better understand your bodily system. Knowing these amazing facts will definitely leave you awe-struck by the complexity of the human body.