What does the body frame of plants consist of?

The cell membrane, or cell wall, is an inanimate derivative of the plasma membrane, it preserves the shape of the cells and protects their internal contents. The basis of the shell is fibrils — cellulose filaments, which are lignified in some plants, that is, they are impregnated with lignin, tannin, calcium salts and silica. Lignified fibrils of cell membranes form a solid plant framework, which gives it strength.

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