Video #1: https://youtu.be/P8XRw_27T8k Video #2: https://youtu.be/Js4qEylwXNM Doubleman Rowdy is a gentle, stout Blue Roan stallion that has been usedâ¦.
Xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. Xylem tissue consists of a variety of specialized, water-conducting cells known as tracheary elements.
There are four types of xylem cells: 1  Xylem vessels: Consist of dead hollow cells because the walls are lignified and the cell contents disintegrate. 2  The lignin makes the cell wall impermeable so they are in effect waterproof. 3  It also makes the vessels extremely strong and prevents them from collapsing.