23 [Lifespan is related to cells] Cells divide and change

Cells divide and change     The human body consists of approximately 60 to 70 trillion cells. Cells such as nerve cells that make up the brain, striated muscle cells that make muscles, and osteocytes that make bones come together one by one to become tissues, and tissues come together to become organs and organs, forming the human body, each playing its own role in its own place. . Of course, other cells cannot take over or change that role.      All living things have an average lifespan. The average human lifespan is usually around 75 to 85 years. But this is literally just an average. If you look around you, you will notice that some people are aging faster and some people are over 100 years old. Why? What affects a person's lifespan? It's a cell.      Cells divide and change with age. Every day, billions of diseased and aged cells disappear and new cells are born. Medical scientists and scientists call this cell division. The division of new cells after an injury or surgery is usually referred to as ‘new skin growth.’      Healthy cells maintain the health of the body by receiving oxygen and nutrients through each organ, blood vessel, and airway, and smoothly discharging carbon dioxide and secretions. On the other hand, if cell division exceeds a certain number of times, function is gradually lost and the tissue becomes stiff. The body becomes rigid and cannot function efficiently. So what happens to your body? Since oxygen and nutrients cannot be transported properly and carbon dioxide and secretions cannot be properly excreted, pigments and fatty substances will naturally accumulate inside the cells. The reason that severely ill or aging patients do not get better and eventually die even after surgery is because their cells have completely stopped dividing.