31.5: Tutorial: Pressure flow in plants, Discover Biology 3rd Edition, W.W. Norton Company, "This tutorial examines how plants use water pressure to transport sugar in phloem tissue from the le

Animation Phloem Loading Glencoe McGraw Hill Wonderful animation, with audio.

Bast fibre Wikipedia.org Brief article with illustration.

Companion Cells James D. Mauseth Integrative Biology University of Texas High magnification of cucumber phloem that shows sieve tubes and companion cells.

Phloem Wikipedia.org In vascular plants, phloem is the living tissue that carries organic nutrients (known as photosynthate), particularly sucrose, a sugar, to all parts of the plant where neede

Phloem Phloem.org A large labeled illustration and definition.

Phloem Kids.net.au Encyclopedia A definition of phloem with hypertext links.

Plant Energy Transport By C R Nave, Department of Physics and Astronomy, Georgia State University Photosynthesis, phloem, pressure-flow theory - it's all explained here and much more.

Sieve tube element Wikipedia.org Brief article and illustration.

Sieve-tube By David Darling Illustration and brief description.

Sugar Transport SparkNotes.com Sugars, which are formed by the plant during photosynthesis, are an essential component of plant nutrition. Like water, sugar (usually in the form of sucrose, tho

What Is Phloem? Written by Victoria Blackburn Wisegeek.com Phloem is a type of tissue found in plants. Along with xylem, phloem makes up the transport system within plants. Phloem and xylem are