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Cell Wall: Like the Great Wall of China... but in your cells.
Found only in plant cells, the cell wall is the utmost form of protection in plants. Not only does it prevent excessive intake of water, it also maintains the shape of the plant cell.
The cell wall is created from microfibrils made of cellulose embedded in a matrix of other polysaccharides and proteins. Cell walls have two layers: first, the primary cell wall which grows in a plants youth. This wall is relatively flexible and thin. Between primary walls is the middle lamella, a layer composed of pectins that "glue" plant cells together.
When the cell stops growing, it strengthens its wall by secreting hardening substances into the primary wall, or by adding a secondary wall, which is deposited in many layers and is incredibly strong and durable.
Since the Great Wall of China probably isn't within your grasp, you might as well settle for a new cell wall! Strenghten your core today with just one simple payment of $0.99 per wall! That's a lot less money than traveling to China.