Plant tissues

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Meristematic Tissue Characteristics

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- Unspecialized tissue - Rapidly dividing (mitosis) - Found in roots and shoots - Responsible for new plant growth up/out (shoots) and down (roots)

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what diagram is this?

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meristematic tissue in plant growth regions

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Epidermal Tissue ("Dermal")

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Forms protective outer covering and allows for the exchange of materials and gases into and out of the plant.

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Ground Tissue

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Provides strength and support in the stem, stores food (sugars) and H₂O in roots, and is where photosynthesis occurs in leaves.

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Vascular Tissue

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Xylem transports H₂O up to leaves, and Phloem transports sugars from leaves.

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Diagram of Plant Tissues

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Illustrates the location and function of different plant tissues.

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Photosynthesis process in plants

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Plants use CO₂ from the atmosphere to produce glucose and O₂, occurring in chloroplasts of leaf ground tissue cells.

Plants need to exchange gases (CO₂/O₂) with the environment.

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Function of stomata in plants

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Plants open and close stomata (singular stoma) underneath the surface of their leaves to exchange gases for photosynthesis.

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Diagram showing open and closed stomata with guard cells

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Illustration of guard cells and stomata, showing the process of opening and closing for gas exchange.

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Stomata function

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Stomata open and close due to the functioning of guard cells. Guard cells swell (open stomata) when H₂O moves inwards by osmosis and shrink (closed stomata) when H₂O moves outwards by osmosis.