. Elementary biology; an introduction to the science of life . Fig. 62. Vessels in a plant Section of squash stem, showing phloem vessels, /%, which conduct food down from the leaves, and two kinds of wood vessels, IV, which conduct water and salts up from the roots. The two kinds of wood vessels are those with spiral thickenings in the walls and those with pitted walls

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Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology