bài giảng Transport in plants

Transport of MaterialsWorld of Plants Standard Grade Biology... Need for transport systems• Plants need sugars and water to stay alive Water needs to travel from the roots to the le

Transport of Materials

World of Plants Standard Grade Biology

Need for transport systems

• Plants need sugars and water to stay

alive

Water needs

to travel

from the

roots to the

leaves

Sugars need

to travel from the leaves to the rest of the plant

• Hollow dead tubes

• Water and minerals transported in an upwards direction

• Made of lignin

• Transports sugar around plant

• Made of living cells

• Companion cells provide the energy for the tube cells

• Tiny pores found on the surfaces of a leaf

• Stomata take in carbon dioxide from the

air through stomata

• Water vapour passes out from the leaf to

the atmosphere through stomata

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