can someone explain the structure of a xylem vessel in simple terms for me?

Xylem
There are four types of xylem cells:


Xylem vessels: Consist of dead hollow cells because the walls are lignified and the cell contents disintegrate. The lignin makes the cell wall impermeable so they are in effect waterproof. It also makes the vessels extremely strong and prevents them from collapsing. They have a wide lumen and are linked end to end to create a long, hollow tube since the end cell walls have one or many perforations in them. This allows the transport of large volumes of water. The sidewalls have bordered pits (unlignified areas) to allow lateral movement of water. Xylem vessels are found in angiosperms.
Tracheids: Similar to vessels but with narrower lumens and connected by pits. They have tapered ends so that they dovetail together. Tracheids are found in conifers.
Parenchyma: Living cells with thin cellulose walls. They can store water, which makes them turgid and so gives them a supporting role.
Fibres: They provide strength because their walls are lignified (and therefore, dead).