CELL WALL DEFINITION; ★ CELL WALL IS A NON-LIVING AND STRONG COMPONENT OF CELL. PRESENCE; ★ WE KNOW THAT NOT ALL LIVING ORGANISMS HAVE CELL WALL AROUND THEIR CELLS, LIKE ANIMALS AND ANIMAL LIKE PROTIST . LOCATION; ★ IT IS LOCATED INSIDE THE PLASMA MEMBRANE. FUNCTION; ★ IT PROVIDES SHAPE, STRENGTH, PROTECTION AND SUPPORT TO THE LIVING MATTER (PROTOPLASM) OF CELL. LAYERS AND CHEMICAL COMPOSITION ; ★ PLANT CELLS HAVE VARIETY OF CHEMICALS IN THEIR CELL WALLS. PRIMARY WALL; ★ THE OUTER LAYER OF PLANT CELL WALL IS KNOWN AS PRIMARY WALL. CHEMICAL; ★ AND CELLULOSE IS THE MOST COMMON CHEMICAL IN IT. SECONDARY WALL; ★ SOME PLANT CELLS FOR EXAMPLE ; XYLEM CELLS, ALSO HAVE SECONDARY WALLS ON THE INNER SIDE OF PRIMARY WALL. CHEMICAL; IT IS MUCH THICKER AND CONTAIN LIGNIN CHEMICAL. MIDDLE LAMELLA; ★ THE MIDDLE LAMELLA IS FIRST TO BE FORMED IN BETWEEN THE PRIMARY WA...
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