The gallbladder isn't completely necessary for digestion. The body can carry without the spleen, many people don't have an appendix and are doing just fine. Dialysis can keep you living if you lose your kidneys. One lung is enough to hold you breathing. Reproductive organs aren't vital for survival.

The colon is a piece about the digestive system that you could waste. You don't need your bladder to procure rid of excess. You can yet eat regular food without a stomach. You can live outwardly a thyroid if you take certain medications. You don't need eyes to survive.

The human body is a marvellous device with more than 600 muscles, around 206, bones, and thousands of tendons. There is a batch of moving parts that go into managing a person alive. 

Our organ is in the middle of all this action. Each one is a part of a bigger system and has a specific target that allows our bodies to perform many of life's necessary functions.

Did you comprehend that the body is capable of carrying on externally some of them? 

It turns out that you don't really need all of your organs to live. Due to a combination, countless humans have lived and are currently living without several organs that were once thought of as vitals.