Stems. S7-3-1. 2 Functions of a Stem. Transport water, minerals, and food between roots and leaves (via phloem and xylem) Hold leaves up to receive sunlight. 2 types of stems. Herbaceous -green and soft, bendable (sunflower, peas, grass)
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Outer bark—old phloem, gives protection
Cambium—where growth occurs
Pith—soft center core; contains . large, thin-walled cells that . store water and food
FYI: ¾ used for construction
Stolon: A stem that grows horizontally above the ground and produces roots and shoots to create new plants. Also called runners.
It’s such a big category,
it needs a separate page!!
We like to eat some stems!
common tuber . . .
Tubers—underground stems used for food storage and reproduction
Ex. potato (the ‘eyes’ will grow new stems)
The stem “swells” to
store food for the plant
The green plant grows above ground with tubers
The tubers may then be dug up and eaten