* Tracheids: These are long, thin cells that are dead when mature. They have thick, lignified cell walls that help to support the plant and transport water.

* Vessel elements: These are also long, thin cells, but they are wider than tracheids and have thinner cell walls. They are also dead when mature, and they help to transport water.

Phloem:

* Sieve tube elements: These are long, thin cells that are alive when mature. They have thin cell walls and contain cytoplasm and organelles. Sieve tube elements are responsible for transporting sugars and other nutrients throughout the plant.

* Companion cells: These are smaller cells that are closely associated with sieve tube elements. They help to support the sieve tube elements and provide them with nutrients.