Presentation on theme: "Plant Parts - Leaves 2001 AgriTeach.comTM (12901ms)"— Presentation transcript:
1 Plant Parts - Leaves2001 AgriTeach.comTM (12901ms)
2 Why are plants important? They are the direct or indirect source of all food for animals.All plant life produces oxygenWhat other benefits can you think of?BeautificationFreshening airBlock windPrevent soil erosionProvide shelter for animalsBuilding materials and fuels
3 Basic Parts of the Plant Can you think of the 4 basic parts & their functions?Leaves:food factory of the plantStems:support and moving materialsRoots:anchor plant, store food, absorb nutrients, reproductionFlower:forms fruit and seeds, allows for pollenation
5 Functions of Leaf Cells Epidermis - Protects leaf from losing H2OPalisade Layer - Contains chloroplastsSpongy Tissue - Allows for gas exchangeLower Epidermis - Contains most stomaStoma/Guard Cells - Open and close to regulate amount of water in the leaf; prevents wilting.
6 Internal Leaf Structure How many different types of cells make up leaves?FIVE: upper epidermis, palisade layer (has chloroplasts), spongy tissue, lower epidermis, and guard cells.
7 Electron Micrograph of Leaf Can you identify the layers?
8 Photosynthesis Photosynthesis is a chemical reaction: 6CO2 + 6H2O + Light = C6H12O6 + 6O2Left over OxygenCarbon DioxideWaterGlucose (energy)Plants also respirate, much like animals when light is not available.They do, however, make much more O2 than they use.