Tree Rings

phloem

dead xylem

active xylem

Xylem and Phloem

What is vascular tissue exactly?

Spiderwort Leaf

(stomata)

Photosynthesis:1) The 2 substances required

for photosynthesis are:

2) The main product of photosynthesis is:

3) The waste product is:

carbon dioxide (CO2 ) and water (H2O)

glucose (C6H12O6)

oxygen (O2)

Anatomy of a LeafYou should be writing down anything you

see in RED.

Leaf Structures

Stomata• Opening formed by two ____________.

• Found on the ____________ of the leaf.

• Allow _______ to enter the leaf.

• Allow _______ and _____________ to exit.

• Conserve water by closing __________.

guard cellsunderside

CO2

water vaporO2

Please take out your homework (DR 5.1) and copy the following notes into your science journal.

at night

Open stoma

Closed stoma

For photosynthesis to take place, leaves must have a constant supply of: CO2 and water

Leaves must get rid of:O2 and excess water vapor

Stoma

Guard cells

Stomata

Layers of a Leaf A.B.C.D.E.F.G.H.

CuticleEpidermisStomata (guard cells)Palisade layerVeinSpongy layer (air space)XylemPhloem

Why Are Leaves Green?

Layers of a Leaf

A.

B.

C.

D.

E.

F.

G.

H.

Cuticle

Epidermis

Stomata (guard cells)

Palisade layer

Vein

Spongy layer (air space)

Xylem

Phloem

Photosynthesis Cellular Respiration

• light energy food

• CO2 in; O2 out

• occurs in chloroplasts (only in plants)

• food usable energy

• O2 in; CO2 out

• animals do this all the time; plants ALSO do it when they’re not doing photosynthesis.

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