The increase in girth is caused by continuous division of cells in the lateral meristem. These cells form new tissues concentrically inside and outside the stem, increasing diameter, producing annual rings and strengthening the plant body over time.
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Plants grow in girth through the activity of lateral meristem present along the stem circumference. These actively dividing cells produce new cells inside and outside, increasing stem thickness and forming annual growth rings in woody plants gradually.
“Tissues in Action” explains how similar cells group together to form tissues that perform special functions. Different tissues help organisms grow, move, transport materials, protect the body and coordinate activities. This division of labour increases efficiency and supports complex life ...