Plant cell structure and plant stems
Different part of the plant stems have different functions there are two main things, these are xylem vessels and the sclerenchyma fibres.
Water is transported through xylem vessels through diffusion gradients. When water evaporates away it is called transpiration. The stream of water passing through a plant is called the transpiration stream. The water movement through the xylem provides a mass flow system for the transport of inorganic ions.