The structure of a leaf has adaptations so that it can carry out photosynthesis effectively. Procedure: Remove a leaf from the plant and place it flat on the table. With the sharp knife or razor blade (and adult supervision), cut the leaf straight down the center. Many vascular bundles are arranged parallaly. Absence of cambium. Leaf (b) 1. Professional leaf cross-section slides. Monocot and Dicot Leaf: Type # 2. Model 2 — Cross Section of the Internal Structure of a Leaf Cuticle Upper epidermis Chloroplast palisade mesophyll Air Space Lower epidermis Vein Spongy mesophyll Cuticle Guard cell f Stoma 8. Different plant cell types form three main tissues found in leaves. 4. Leaf Cross Section Showing Tissues and Cells. Leaf vascular tissue is located within the mesophyll layer. Which life functions are directly regulated through feedback mechanisms associated with the actions of the structures labeled X? … Thus they do not possess two epidermal layers. The differentiation of tissues into epider­mal, ground and vascular is clear. Redrawn from Esau (1948) by Scott Snyder. 2. Stomata on both the surfaces. Cross section of 3-year-old grapevine arm. A transverse section through a leaf of onion (Alliumcepa of family Liliaceae) would show the following internal structure (Fig. 623): These tissues include a mesophyll tissue layer that is sandwiched between two layers of epidermis. Leaf tissues are composed of layers of plant cells. You can see these if you look at a transverse section (cross-section) of a leaf under a microscope. These leaves are acicular in shape and are more or less rounded in cross-section. List the la ers of the leaf starting at the upper cuticle all the way to the … It forms a protective covering on leaf vein, and consist of one or more cell layers, usually parenchyma. The bundle-sheath cells are the photosynthetic cells arranged into a tightly packed sheath around the vein of a leaf. 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