Sertoli cell, Sertoli's cell-elongated cells found in the seminiferous tubules of the testis; apparently they nourish the spermatids. biological science, biology-the science that studies living organisms. plant cell-a cell that is a structural and functional unit of a plant.
The life expectancy of a toilet is more than 100 years. In fact, a study conducted by the National Association of Home Builders determined that toilets can last indefinitely.
Time Frame. Electric hot water heaters generally have a longer life expectancy than their gas counterpart. A gas unit will have a lifespan from 8 to 14 years. An electric unit will have an average lifespan of 10 to 18 years. Electric hot water heaters do not require flues or vent pipes.