Which tissue type is the xylem primarily composed of?

The xylem is primarily composed of dead tissue at maturity, which plays a crucial role in the transport of water and minerals from the roots to the rest of the plant. The main components of xylem tissue include tracheids and vessel elements, both of which are specialized for efficient water conduction. These cells lose their living contents and become hollow at maturity, allowing for the unimpeded flow of water.

The presence of dead cells is advantageous because it enables the xylem to handle the pressure and tension generated during water transport without the risk of collapse. The rigidity of the cell walls also provides structural support to the plant. In contrast, living tissues, active living cells, or storage cells do not fulfill the specific functions associated with xylem, making them less relevant in this context. The primary role of xylem is to facilitate water transport and provide support, which is effectively achieved through its composition of dead tissue at maturity.