Vascular bundle and Vascular tissue

Vascular bundle noun - A unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem.

Vascular tissue and vascular bundle are semantically related. In some cases you can use "Vascular tissue" instead a noun phrase "Vascular bundle".

Vascular tissue noun - Tissue that conducts water and nutrients through the plant body in higher plants.

Vascular bundle and vascular tissue are semantically related. Sometimes you can replace phrase "Vascular bundle" with "Vascular tissue", this phrases are similar.