Students can obtain different types of leaves (thick and long leaves etc) andĬompare the appearance of such structures as the stomata, shape and arrangement Students can view different parts and structures of a leaf. Using the stereo and compound microscope, Part of the leaf structure also has air spaces. Mesophyll (elongated cells) and the spongy mesophyll (spherical or ovoid). Section of the leaf contains two different type of cells including the palisade This includes the upper and lower epidermalĬells (flattened cells) with the mesophyll layer in between. To view the internal structure of the leaf. Under high magnification, students will be able The roll to obtain a very thin slice (to obtain a very thin, almost transparent It would be important to prepare a cross section of a leaf to observe theĪrrange of cells inside the leaf structure. The leaf allows the student to observe the stomata and other epidermal cells,
Parts of a leaf worksheet skin#
Whereas the transparent thin epidermal skin of Referred to as guard cells and contain a nucleus and chloroplasts. Under high magnification, students can differentiate betweenĬlosed and open stomata. Typically, the stomata are bean shaped and will appear denser In addition to theĮpidermal cells, one will also see the leaf spores (stomata) in between theĮpidermal cells. To see the epidermal cells that tend to be irregular. When viewed under the microscope, it's possible Paper, place the slide on the microscope for observations Glass slide and add a few drops of glycerineĬover the epidermal skin on the slide with aĪfter removing excess glycerine with a blotting Place the epidermal skin onto a clean, dry Solution and place it in the glass with water once again to remove excess stain Move the epidermal skin from the safranin Remove the epidermal skin from the watch glassĪnd transfer to another watch glass with safranin for about 30 seconds (few Place the peel into a watch glass that contains Using a pair of tweezers, peel off the lower surface of the leaf Having obtained a leaf, carefully fold it and When viewing the cells of a leaf, this should beĭone using a compound microscope. The microscope (stereo microscope or under low power on compound microscope) (vascular bundles) between two hard surfaces (such as a book) to prevent from twisting Possible to isolate the vascular bundles (vein structures) for viewing underįeeling slimy, remove from the pot and place on a plate/Petri dishĪnd gently remove the soft part using a small brush from both sides of the leaf With some leaves (such as the maple leaf), it's Intricate leaf veins (vascular bundles) running across the surface of the leaf. Trapping insects to trapping water/moisture. (trichome) on the leaf surface that serve a number of functions ranging from Stereo microscope, students will be able to clearly see hair-like structures When viewing the surface of the leaf under the Zebrina plant leaf (older leaf) it's possible to view the stomata as green Microscope can also be used for this purpose. While the compound microscope would be moreĮffective for viewing the frequency of the stoma, a stereo dissecting Increase to 100x (frequency of stoma can be counted at 100x) Peel off a film (thin skin) from the surface of the leafĪ microscope slide and cover with a cover slip To the surface of the leaf (flattened leaf) Theįollowing is the procedure for viewing (as well as estimating stomatalįrequency) stoma on the surface of a cell. Movement of water and gases in and out of the intercellular spaces. These pores vary in size and allow for the Stoma refers to the minute pores that can beįound on the epidermis of a leaf. Increase gradually and record your observation Ideal tool for observing the external structure of a leaf (vein, lamina etc). Viewing the internal leaf structure, a stereo microscope would be the To do this a compound microscope is required given that it View and identify these cells and how they are arranged (epidermal cells, Like any other multicellular living thing, leaf structure is made up of layers of cells. Viewing the leaf under the microscope shows different types Preparation, Requirements and Observations