What is cancer? Cancer is caused by the uncontrolled growth of a part of one’s own organism and the damage it causes to healthy tissue. In other words, cancer is the result of a group of cells growing and dividing out of control and becoming disorganized. Regulatory mechanism of cell growth 1. Supplementation of daily consumption: Although it is not usually noticed, the fact is that cells in every part of our body are dividing and growing all the time. Usually easy to observe only certain cell growth, such as hair and nails. This growth supplement is necessary because our body’s cells are being depleted every day as they die, become damaged, or age. For example, the body sheds millions of cells every day from the skin, mouth, and digestive tract. Cells grow in any part of the body, such as blood cells in the bone marrow, which is the site of hematopoiesis. Therefore, the body consumes cells every day, and there is always appropriate cell growth to replace those lost cells. Theoretically, without this continuous process of consumption – replenishment, the body will be exhausted in a few days. 2, the response to injury: the body is not simply repeat the growth every day, sometimes also respond to some of the damage. For example, when trauma occurs, the cells need to accelerate growth, repair the trauma and complete the healing process we usually say. After a surgical operation, the incision heals within a week (or ten days) on average, at which point the skin in the area exhibits normal elasticity. In this process, the skin cell growth rate increased greatly (but within the normal range), a few days can grow tens of millions of cells. 3, growth regulation: It is important to note that when the cells that are growing fill the surgical incision, they stop growing. That is, the cells will continue to grow until the skin on either side of the scar is connected, and then the accelerated growth of the cells will return to normal levels. This process is often referred to as contact inhibition. In fact, there exists a growth regulating mechanism that regulates how long the accelerated cell growth lasts, and once the skin heals it returns to its normal growth rate, stopping the overly rapid growth and not allowing the cells to grow endlessly and form too much skin tissue. In rare cases, skin cells do not stop growing as usual. Sometimes they continue to grow and build up, eventually forming a thick, above-surface scar of about a few centimeters. Even so, these cells do not grow at such an accelerated rate for long. Normal Cell Growth and Repair Out-of-control cancer occurs when cells “refuse” to follow the body’s regulatory mechanisms, ignoring the conventional messages that prevent them from growing and dividing; out-of-control growth alone does not cause cancer. However, the accumulation of cell growth can lead to warts or scars on the skin that rise above the surface. Cancer cells do not just grow in piles; there are five other characteristics that explain all of their behavior. 1. Cancer cells continue to grow and divide when they should not. 2, Cancer cells have the ability to transcend the boundaries of the tissue in which it is located. In other words, it can invade surrounding tissues. 3, Cancer cells can enter the bloodstream or other (e.g., lymphatic vessels, etc.) channels and pathways to reach tissues farther away from the site of origin. 4. Cancer cells can produce secondary tumors in these distant tissues. Some cancer cells also produce substances that affect the functioning of the body, acting on the nervous system, the muscular system, the fluid balance system, and other systems. Cancer growth Two words can summarize the characteristics of cancer cells – infiltration and spread. 1. Cancer cells have the ability to infiltrate adjacent normal tissues. 2, It has the ability to spread to distant tissues. If cancer cells did not have these behaviors, cancer would be no more difficult to deal with than a wart, and it could be removed with no further worries.