First 108 words of the document:
What is it?
Mass Transport is the movement of large volumes of fluid and dissolved substances within a
How does it work?
There are any different organs of gas exchange such as lungs and gills, but these organs
would be ineffective without a distribution network to the rest of the body. To be effective,
gas exchange organs need a circulatory system, which usually takes the form of a network
of tubes or vessels that connects to all parts of the organism.
Plants, have xylem and phloem
Animals, have a circulatory blood system.