Here's how it works:

* Normal cells have a mechanism that prevents them from growing and dividing uncontrollably. When they come into contact with other cells, they stop dividing. This is a crucial factor in maintaining tissue organization and preventing tumors.

* Cancer cells often lose this contact inhibition mechanism, allowing them to grow and divide even when they are packed tightly together. This contributes to the formation of tumors.

So, contact inhibition is a natural process that regulates cell growth and division, ensuring that tissues grow and develop in a controlled manner.