Video Transcript
Plant tissues can be organized into
systems. What two structures is the vascular
system comprised of?
Vascular plants have a vascular
system that is composed of specialized vascular tissues that are used for
transporting substances. The two main vascular tissues in
plants are called the xylem and the phloem. The phloem transports substances
like sugars and amino acids either up or down the plant stem. While these sugars and amino acids
are technically dissolved in water so there will be some water involved in phloem
transport, it is not its main function to transport water. That’s the function of the
xylem.
The xylem transports water and
minerals from the soil in a one-way flow from the roots through the stem to the
upper parts of the plant like the leaves, where it is required for
photosynthesis. So the two structures the vascular
system in plants is composed of are the xylem and phloem.
