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Understanding the Parts of a Plant and Their Functions

Delve into the primary source of energy in the ecosystem — plants. Learn about the carbon cycle, photosynthesis, leaf structure, and how plants contribute to our well-being and the environment. Explore the roles of leaves, stems, roots, and flowers in a plant's growth and survival.

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Understanding the Parts of a Plant and Their Functions

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  1. Parts of a Plant and Their Function

  2. Plants • Primary source of energy • Sun -> grass -> deer -> humans • Carbon cycle • Take in carbon dioxide, produce glucose and oxygen • Keep us cool, wind breaks, holds soil in place, provide habitat, building materials, fuel

  3. Parts of a Plant • Four basic parts • Leaves • Stems • Roots • Flowers (fruit/seeds)

  4. Leaves • “Food Factory” through photosynthesis • Vary in shape, size, and arrangement • Help identify plants • Simple, compound • Toothed, pointed, smooth • Lobed, ovate, lanceolate • Whorled, alternate, opposite

  5. Parts of a leaf • Petiole – leaf stalk • Blade – flat part of the leaf • Midrib – large center vein • Veins – branch of the midrib and form network • Margins – edges of the plant leaves

  6. Leaf is made of specialized cells • Epidermis • Outer, protect the leaf from loss of moisture • Guard cells responsible for opening and closing stomata • All the plant to breathe • Center, food making • Chloroplast has chlorophyll • Photosynthesis • Process by which carbon dioxide and water in the presence of light are converted to sugar and oxygen

  7. Food manufactured in leaf moves down through the stem to the roots • Used or stored in stem or root • Sometimes cells in roots, stems, and leaves • Respiration • Oxygen used to produce energy for cells • Too much water can affect efficiency

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