US National Weather Service Philadelphia September Weather data records that on September 28, 1984, the high temperature did not exceed 52 degrees Fahrenheit, the lowest high measured in Philadelphia in the past 69 years.
Vacuoles are generally used to store cell products or protect the rest of the cell from invading microorganisms. The large central vacuole of plant cells is a special case. It is used to store water and cellular wastes and helps maintain the necessary internal pressure of plants called turgor pressure. Structure.
Plant cells are very much like your own cells, except they are surrounded by a cell wall. This cell wall is part of what gives plants such a rigid and sturdy structure. Plant cells need a certain amount of pressure to make sure that the cell wall stays rigid. Pressure from fluid within the cell pushing against the cell wall is called turgor pressure. How It Works The way a cell maintains pressure is through a process called osmosis.