1. 22-3 Seedless Vascular Plants

2. Vascular tissue Vascular tissue is a type of plant tissue specialized to conduct water and nutrients throughout a plant.

3. Tracheid Tracheid is a hollow plant cell in xylem tissue with thick cell walls that resist pressure.

4. Xylem Xylem is the vascular tissue that carries water upward from the roots to every part of a plant.

5. Phloem Phloem is the vascular tissue responsible for the transport of nutrients and the carbohydrates produced by photosynthesis.

6. Lignin Lignin is a substance in vascular plants that makes cell walls rigid.

7. Root Root is an underground organ in plants that absorbs water and minerals.

8. Leaf A leaf is a photosynthetic organ that contains one or more bundles of vascular tissue.

9. Vein A vein in plants, a cluster of vascular tissue in leaves; in animals, a blood vessel that returns blood to the heart.

10. Stem A stem is a supporting structure that connects roots and leaves and carries water and nutrients between them.

11. Rhizome Rhizome is a creeping or underground stem in ferns.

12. Frond Frond is a large leaf of a fern.

13. Sporangium Sporangium is a structure in ferns and some fungi that contains spores.

14. Sorus Sorus is a cluster of sporangia on the underside of a fern frond.