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SAND AND SALT LAB
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SCIENCE 7 TOPIC SIX
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THE THREE FUNCTIONS OF ROOTS
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1. Anchor the plant in the ground
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2. Absorb water and minerals from the ground
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3. Store plant’s nutrients
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XYLEM AND PHLOEM DIFFERENCES
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Xylem is for upward movement of materials Phloem is for downward movement of materials
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IMPORTANCE OF ROOT HAIRS
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Root hairs greatly increase the surface area of the roots of a plant so it can absorb more nutrients
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THE FUNCTIONS OF THE STEM
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Support of the plant
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Transport nutrients though the plant
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Help hold leaves up toward the light
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Store some of the plants nutients
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HERB AND WOODY STEM DIFFERENCES……
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Woody stems are found mostly as perennials
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Herb stems are found mostly as annuals
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Woody stems have a cambium layer that separates the xylem from the phloem
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Herb stems have their xylem and phloem tubes grouped together
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Woody stems are not pliable
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Herb stems are pliable
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THREE TYPES OF ROOTS
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1. Fibrous Root
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2. Tap Root
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3. Above Ground Root
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Aireal Epiphytes
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The Hydration Lab
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