Answer: Life span, Life expectancy.
Explanation:
Sex is a reproduction system involving both male and female to partake in sexual activity intercourse to create an offspring between the two beings creating a living organism
In finding disease we must find its cause and we are made up of cells so every disease has something to do with our cells so if we understand we can know what is Poisson or what will damage it like smoking .
Hope this helps
Brainliest?