90% of our bodies are made up by other organisms that are not of our own DNA. Bacteria, Water with organisms. Our intestine that makes up a huge portion of our digestive system is loaded with tens of pounds of foreign non-human organisms. Our Organs and the name organism just means that the human being as well as every other living creature lives co-dependently with the living and non-living ecosystem. That is LIFE. When things get bad is when an organism starts over taking your host body, That is called disease. But your NEVER going to get away from it unless you get rid of 90% of your own body. Then you would die. Organs are living systems put together for survival of natural systematic existence. Do not put to much thought into that. We have inner parts as females in which lots of tissue sheds constantly. We have friendly bacteria. and other organisms that help our body cope with the environment. That rope that grows inside peoples bowels have been tested for DNA determination and scientists found out that part of the round worm-rope casing actually has the persons DNA incorporated into the worm-ropes DNA. Its called evolution. Doctors actually infect people with different kinds of worms to cure different physical problems. Like allergies. They discovered that people who dewormed themselves have an autoimmune response that was killing them because for thousands of years humans lived with worms and worms release an antihistimine that calms the human bodies immune system, Heck out immune system is not even ours. White blood cells, etc are a separate entity that fights independantly from our knowledge like a built in army. So stop over worrying about that. If you feel grossed out just remember this Right now you have trillions of microscopic bugs crawling around you and inside of you this very min. Give up, Its never going away, Be happy and live in harmony with the world. 90% of your existence depends on the help of other germs/worms/bugs to keep you living. We are all a bug to another bug