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

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)

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

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

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.

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.

Comparing Parenchyma and Collenchyma

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.

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.

Comparing all three

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

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