What are the key differences between cancer tissue and normal tissue in terms of their cellular composition and behavior?

Cancer tissue differs from normal tissue in terms of its cellular composition and behavior. Cancer cells grow uncontrollably, invade surrounding tissues, and can spread to other parts of the body. They also have genetic mutations that drive their abnormal growth. In contrast, normal cells have controlled growth, specific functions, and do not invade other tissues. Additionally, normal cells have intact cell cycle regulation mechanisms, while cancer cells have disrupted cell cycle control.