DENDROLOGY

Detailed explanation-1: -The inner walls of the xylem vessels are strengthened by the deposits of a substance called Lignin. Lignin is a tough and rigid substance; it prevents the vessel from collapsing. Companion cells-These cells are found inside the phloem of angiosperms. End wall-It is absent in xylem.

Detailed explanation-2: -The cell wall also contains a tough, woody substance called lignin, which strengthens the xylem vessel and provides structure and support to the plant.

Detailed explanation-3: -Lignin patterns in xylem cells provide rigidity and water transport across the plant. A, Xylem tissues comprise several lignified cell types: vessels elements and tracheids, which are tracheary elements that transport water and fibers.

Detailed explanation-4: -Xylem is a tissue consisting of dead, hollowed-out cells that form a system of pipes. The walls of xylem cells are lignified (strengthened with a substance called lignin ). This allows the xylem to withstand pressure changes as water moves through the plant.

Detailed explanation-5: -Xylem consists of dead cells. The cells that make up the xylem are adapted to their function: They lose their end walls so the xylem forms a continuous, hollow tube. They become strengthened by a substance called lignin .