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UNIT 8-3

The Plant Kingdom. UNIT 8-3. Focus Topics:. Leaf structure & function Leaf Types Photosynthesis = Food Making Parts of a Leaf. Section 8-3 : Structure of the Leaf. Leaves vary in structure, but their function is typically the same. Leaves: __________

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UNIT 8-3

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  1. The Plant Kingdom UNIT 8-3 Focus Topics: • Leaf structure & function • Leaf Types • Photosynthesis = Food Making • Parts of a Leaf

  2. Section 8-3: Structure of the Leaf • Leaves vary in structure, but their function • is typically the same. Leaves: __________ • __________________________________ • __________________________________ • B. There are two basic types of leaves: • 1) Simple:__________________________ • ________________________________ • 2) Compound: ______________________ • ________________________________ capture the sun’s energy and produce food by means of photosynthesis. Has a blade that is in one piece. (Maple, Oak, Apple trees) Has blades that are div- ided into separate leaf-like parts.

  3. Section 8-3: Structure of the Leaf 3) Draw a simple and compound leaf below: SIMPLE COMPOUND

  4. Leaf Characteristics A 1. 2. 3. B 4. 5. 6. compound leaf petiole leaflets veins Simple lobe margin blade

  5. Section 8-3: Structure of the Leaf • Leaf venation or vein direction can be: • _______________ • _______________ • _______________ • Another characteristic that can help tell leaves apart, is the shape of the leaf base. Draw a leaf for each of the following leaf base shapes: pinnate palmate parallel V-shaped Flat Heart

  6. Section 8-3: Structure of the Leaf A. Leaves carry out a special food making process called _____________________. This is when________________________ __________________________________ __________________________________ Write the equation for Photosynthesis in the box: photosynthesis sunlight is changed into food energy with the release of sugar and oxygen. 6CO2+6H2OC6H12O6+ 6O2 B. The above equation is the plant version for: ________________________ respiration

  7. Section 8-3: Structure of the Leaf C. The leaf structures and their function: 1) mesophyll: ________________________ __________________________________ spongy:____________________________ palisade: __________________________ 2) guard cell: ________________________ __________________________________ Most of the photosynthesis happens here. Meso-middle /phyll-leaf Soft – place for food storage Straight – food making place Cells that control the open- ing and closing of the stoma (stomate).

  8. Section 8-3: Structure of the Leaf • Parts of the leaf continued… • 3) stoma: ____________________________ • __________________________________ • cuticle: ___________________________ • 5) vein: _____________________________ • D. Label the parts of the leaf. Openings in the epidermis of the leaf – controlled byguard cells. Waxy waterproof layer on the epidermis. Contain the xylem & phloem.

  9. Inside the Leaf –Cross Section of a Leaf 1. 2. 3. 4. 5. 6. palisade layer epidermis vein guard cell stoma spongy layer

  10. Reviewing this Section: $ Explain the difference between a simple and a compound leaf. $ Name three types of leaves (patterns). $ Explain the relationship between the equation for respiration in animals and the equation of photosynthesis in plants. $ What is a cross-sectional diagram?

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