Question

What makes XYLEM ??

Answer 1

The xylem tracheary elements consist of cells known as tracheids and vessel members, both of which are typically narrow, hollow, and elongated. Tracheids are less specialized than the vessel members and are the only type of water-conducting cells in most gymnosperms and seedless vascular plants.

As a young vascular plant grows, one or more strands of primary xylem form in its stems and roots. The first xylem to develop is called 'protoxylem'. In appearance protoxylem is usually distinguished by narrower vessels formed of smaller cells.
Xylem vessels are long hollow chains of toughlong dead xylem cells. Xylem tissue is the water transporter cells of plants. It carries water around a plant. The presence of vessels is a characteristic feature of flowering plants.