human lifespan

Human lifespan refers to the average duration that a person can expect to live, influenced by genetics, health, lifestyle, environment, and access to medical care. Currently, the average global lifespan is about 72-75 years, with variations across countries due to factors like economic conditions and healthcare systems. Biological aging, known as senescence, leads to the gradual decline of physical and mental functions. Advances in medicine, nutrition, and public health have contributed to increases in lifespan over the last century, although individual experiences can vary widely based on personal circumstances and choices.