Diseases of aging refer to a group of medical conditions that are more likely to occur in older individuals due to the natural aging process. These diseases can affect various organs and systems in the body, including the cardiovascular system, respiratory system, nervous system, and musculoskeletal system. Examples of diseases of aging include Alzheimer's disease, osteoporosis, arthritis, cardiovascular disease, and cancer. While some of these conditions may have genetic or environmental factors, they are often associated with the natural decline in bodily functions that occurs with age.