Is it really true that body organs are replaced regularly?
Most cells in the body are replaced regularly so eventually a body organ, such as the heart, likely has ever cell replaced over time. This is become some die due to age or wear and tear; some reach the end of their life cycle. There are many different estimates, but here are a few:
Taste buds every 10-14 days
New bones every 10 years
New heart every 20 years
Margaret Reese, PhD, estimates that only a few groups of cells in a few body parts last most of your lifetime. They include:
neurons in the cerebral cortex, the inner lens cells of the eye, and muscle cells of the heart. More tomorrow.