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Plant Parts - Leaves 2001 AgriTeach.com TM (12901ms)

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Presentation on theme: "Plant Parts - Leaves 2001 AgriTeach.com TM (12901ms)"— Presentation transcript:

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2 Plant Parts - Leaves 2001 AgriTeach.com TM (12901ms)

3 Why are plants important? They are the direct or indirect source of all food for animals. They are the direct or indirect source of all food for animals. All plant life produces oxygen All plant life produces oxygen What other benefits can you think of? What other benefits can you think of? Beautification Beautification Freshening air Freshening air Block wind Block wind Prevent soil erosion Prevent soil erosion Provide shelter for animals Provide shelter for animals Building materials and fuels Building materials and fuels

4 Can you think of the 4 basic parts & their functions? Can you think of the 4 basic parts & their functions? Leaves: Leaves: food factory of the plantfood factory of the plant Stems: Stems: support and moving materialssupport and moving materials Roots: Roots: anchor plant, store food, absorb nutrients, reproductionanchor plant, store food, absorb nutrients, reproduction Flower: Flower: forms fruit and seeds, allows for pollenationforms fruit and seeds, allows for pollenation Basic Parts of the Plant

5 Leaf Anatomy

6 Functions of Leaf Cells Epidermis - Protects leaf from losing H 2 O Epidermis - Protects leaf from losing H 2 O Palisade Layer - Contains chloroplasts Palisade Layer - Contains chloroplasts Spongy Tissue - Allows for gas exchange Spongy Tissue - Allows for gas exchange Lower Epidermis - Contains most stoma Lower Epidermis - Contains most stoma Stoma/Guard Cells - Open and close to regulate amount of water in the leaf; prevents wilting. Stoma/Guard Cells - Open and close to regulate amount of water in the leaf; prevents wilting.

7 Internal Leaf Structure How many different types of cells make up leaves? How many different types of cells make up leaves? FIVE: upper epidermis, palisade layer (has chloroplasts), spongy tissue, lower epidermis, and guard cells. FIVE: upper epidermis, palisade layer (has chloroplasts), spongy tissue, lower epidermis, and guard cells.

8 Electron Micrograph of Leaf Can you identify the layers?

9 Photosynthesis Photosynthesis is a chemical reaction: Photosynthesis is a chemical reaction: 6CO 2 + 6H 2 O + Light = C 6 H 12 O 6 + 6O 2 Carbon Dioxide Water Glucose (energy) Left over Oxygen Plants also respirate, much like animals when light is not available. Plants also respirate, much like animals when light is not available. They do, however, make much more O 2 than they use. They do, however, make much more O 2 than they use.


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