David Bolinsky's Ted Talk

I think that the inside of the human body is really similar to the human life that we have here on earth. I say that because all of the cells, molecular molecules, proteins, etc... work together together to make your body keep on living. Here on earth, each and every organism has a niche that another species relys on to survive. For example without trees we wouldn't be able to survive, because we wouldn't have oxygen to breathe.
Your heart is really the center of the universe or the sun. Every thing relys on that one thing to survive. We rely on the sun in nature for photosynthesis for the food that we eat. In your body if it wasn't for heart none of the other organisms would live. They are all responsible for the different tasks and living in different places. It is almost like they are different countries living in their own climatological places like the stomach, kidneys etc... They are living on their part of their globe minding their own business with out the other half knowing anything. But without each other life wouldn't exist.