Anatomical structure
Wood - Structure and properties

Tree growth

Plant tissues are formed from tissues specialized in cell division, the "meristems", composed of undifferentiated cells.

There are two families.

• Primary meristems

  They are located at the tips of stems and roots, and ensure that plants grow lengthwise by forming clumps of cells in a non-ordered arrangement.

• Secondary meristems

  They appear in the plant from the second year onwards, in the form of continuous layers of cells called "assises", and ensure growth in diameter by producing cells aligned in the continuation of the meristematic cell that gave them birth.

Wood, or secondary xylem, is a tissue derived from the inward functioning of...