Biology B3.1, B3.2-Plants

Parts of leaf tissue

Wax cuticle, palisade mesothelioma, spongy mesothelioma, stoma, guard cell

Palisade mesophyll

Cells specialized for photosynthesis

Spongy Mesophyll

Specialized for gas exchange

Stomata

Openings is upper and lower epidermis; CO2 and O2 exchange

Transpiration

Loss of water through openings in leafs

Gas exchange surfaces must be…

Wet for gas to dissolve and pass through

Transpiration pull

Water pulls water from root to leaves and out

Photometer

Device to measure transpiration

Factors affecting transpiration

Wind, light, temperature, humidity

Cells of xylem

Tracheids and Vessel elements

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Epidermis, Cortex, phloem, cambium, xylem, pith

Root transverse

Cortex, phloem, xylem

How does water move in to root

Mineral ion gradient

Phloem

Source to sink transport

Source

Where sugar comes from

Sink

Storage and growing system where sugar is needed