Cell aging, also known as cellular senescence, refers to the gradual decline in a cell's ability to function and replicate over time. This process is influenced by various factors, including genetic damage, oxidative stress, and telomere shortening. As cells age, they may lose their ability to divide, leading to a decrease in tissue regeneration and repair. The accumulation of aged cells can contribute to age-related diseases, such as cancer, diabetes, and Alzheimer's disease. Researchers are studying ways to understand and potentially reverse cell aging, which could improve health and longevity. This area of study is crucial for developing therapies that target the underlying mechanisms of aging.