Leaf: Definition, Characteristics and Functions (With Diagram 33)Knowledge of Plant Cells a) Water storage? The epidermis houses the guard cells which regulate the movement of water into and outside the cell. Leaf Structure and Function. Function of the waxy cuticle: prevents loss of water 11. The cuticle helps retain water inside the leaf cells. Structure of a leaf (Source: Wikipedia) Each leaf consists of the following layers. A diagram of a plant cell with the organelles labeled. The epidermis aids in the regulation of gas exchange. Epidermis: It is the outermost layer and secretes a waxy substance called the cuticle. https://courses.lumenlearning.com/boundless-biology/chapter/ Parts of a Plant Cell. During the day these cells produce sugar by photosynthesis, causing their walls to curve inward and away from each other and creating a space between the cells called a … Key Concepts The External Structure of a Leaf The typical leaf consists of a flat lamina (leaf blade) at is attached to the stem by means of a petiole The veins of the leaf blade consist of … Show with another labelled arrow the direction the energy comes from. Let us make an in-depth study of the structure and functions of cell. Structure and Components of a Human Cell. b) Go to mitochondria (energy) c) Cell wall function? to allow a lot of light to pas through 12. Give "one word names" for the processes by which these raw materials move across the leaf, as seen in the diagram. The plant cell has many different features that allow it to carry out its functions. Internal structure of a leaf margin guard cells Stoma [plural: stomata] palisade layer spongy layer xylem phloem 9. Spongy Cells: Although theses cells are not at the top of the leaf (they are in the middle) they still do photosynthesis. Comparison of Prokaryotic Cells and Eukaryotic Cells and 2. FUNCTIONS OF LEAF TISSUES AND CELLS Leaves of angiosperms (flowering plants) are flattened to make the most … It consists of the upper and lower epidermis, which are present on either side of the leaf. The Palisade cells have lots of chloroplasts in them to help with the process of photosynthesis. Why are epidermal cells transparent? Internal structure of a leaf 10. By means of labelled arrows drawn on the diagram above, show the pathway taken by each of the two raw materials to a cell in the centre of the leaf. 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