The cells are at the top of the leaf packed in closely. Leaf: Definition, Characteristics and Functions (With Diagram The outermost layer of the leaf is the epidermis. to allow a lot of light to pas through 12. All leaf cells must have direct cell-to-cell contact with the vascular tissues to receive water and dissolved minerals and to export manufactured sugars. Botanists call the upper side the adaxial surface (or adaxis) and the lower side the abaxial surface (or abaxis). Epidermis: It is the outermost layer and secretes a waxy substance called the cuticle. 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 … The plant cell has many different features that allow it to carry out its functions. The epidermis aids in the regulation of gas exchange. Pairs of these cells containing chloroplasts are found on the lower epidermis of the leaf and are responsible for forming stomates. b) Go to mitochondria (energy) c) Cell wall function? Cell is a compartment where all the activities of life takes place. Each of these structures, called organelles, carry out a specialized role. Internal structure of a leaf margin guard cells Stoma [plural: stomata] palisade layer spongy layer xylem phloem 9. The cuticle helps retain water inside the leaf cells. Internal structure of a leaf 10. A diagram of a plant cell with the organelles labeled. a) Large Vacuole b) Sugar destination? Spongy Cells: Although theses cells are not at the top of the leaf (they are in the middle) they still do photosynthesis. Structure and Components of a Human Cell. It consists of the upper and lower epidermis, which are present on either side of the leaf. Why are epidermal cells transparent? The Palisade cells have lots of chloroplasts in them to help with the process of photosynthesis. Give "one word names" for the processes by which these raw materials move across the leaf, as seen in the diagram. Leaf Structure and Function. Show with another labelled arrow the direction the energy comes from. FUNCTIONS OF LEAF TISSUES AND CELLS Leaves of angiosperms (flowering plants) are flattened to make the most … Function of the waxy cuticle: prevents loss of water 11. Structure of a leaf (Source: Wikipedia) Each leaf consists of the following layers. The epidermis houses the guard cells which regulate the movement of water into and outside the cell. 33)Knowledge of Plant Cells a) Water storage? Comparison of Prokaryotic Cells and Eukaryotic Cells and 2. https://courses.lumenlearning.com/boundless-biology/chapter/ c) Structure and strength so leaf is lifted up toward the light Consider how the leaf is adapted to photosynthesis, gaseous exchange and transport. 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