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.
up vote 0 down vote favorite. I have an inexpensive AquaSource toilet that's about two years old that will not hold it's water level in the toilet bowl. I just did a test: flushed toilet, marked water level in toilet bowl with pencil, and observed water.Within seconds after the water shut off the level started dropping.It dropped about 1/2.p vote 0 down vote favorite. I have an inexpensive AquaSource toilet that's about two years old that will not hold it's water level in the toilet bowl. I just did a test: flushed toilet, marked water level in toilet bowl with pencil, and observed water.