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Plant Cell Types and Characteristics: Parenchyma, Collenchyma, and Sclerenchyma

Learn about the different cell types found in plants, including parenchyma, collenchyma, and sclerenchyma. Understand their functions, characteristics, and roles in plant structure and support.

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Plant Cell Types and Characteristics: Parenchyma, Collenchyma, and Sclerenchyma

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  1. Plants Characteristics: • Multicellular • Eukaryotic • Photosynthetic • Cells have cell walls made of cellulose

  2. 2 Categories of Plants: • Non-vascular: • Does not have true • stems, roots and leaves. • Does not have xylem and phloem • Vascular: • Have true stems, roots • and leaves. • Have xylem and phloem • (Vascular tissue)

  3. Cell Types in Plants • Parenchyma, collenchyma, and sclerenchyma • Parenchyma: • Functions: • Conduct photosynthesis • Stores starch, oils, and water for the plant. • Also important for healing wounds of the plant

  4. Parenchyma • Details: Thin cell walls and large water-filled vacuoles in the middle. Most common type of cell in plants

  5. Collenchyma • Functions: • Provide support for the plant, while still allowing it to grow. • They are flexible. • EX: As a young leaf grows, collenchyma cells can elongate, giving the leaf structure. • Do not conduct photosynthesis.

  6. Collenchyma • Details: • Most common in the younger tissues of leaves and shoots • Cell walls range from thick to thin. • Often form into strands. EX: celery strings • Cells walls do not contain lignin, so they are stretchy and can change size.

  7. Comparing Parenchyma and Collenchyma

  8. Sclerenchyma • Functions: • Found in parts of the plant that are no longer growing. • Skeletal support for water-conducting tissues and the plant itself. • These cell fibers are used to make linen and rope. • Form a major part of fruit pits and hard outer shells of nuts.

  9. Sclerenchyma • Details: • This is the strongest cell type of the three • Have a second cell wall that is hardened by lignin. • Makes the cells very tough, durable, and rigid. • These cells are not able to grow with the plant.

  10. Comparing all three

  11. Vocabulary • enchyma: cellular tissue • Ex: parenchyma • para: beside • coll: glue • scler: hard

  12. Identify:

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