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This video walks through the major internal cell types, including the waxy cuticle, upper epidermis, palisade mesophyll... Leaves come in many shapes and sizes.
- 6 min
- 178.5K
- BOGObiology
This video lesson is designed for 3-6-year-old children. It demonstrates the basic structure of a leaf and its parts. This science lesson provides a practical life experience by introducing the child to the different shapes and colors of leaves.
- The external parts of the leaf are the petiole, leaf base, lamina, leaf apex, and leaf margins.
- The internal parts of the leaf are stomata, guard cells, epidermal cells, mesophyll cells, and vascular bundles (xylem, phloem, veins)
- Stomata are tiny pores present on the surface of the leaves that help in exchanging gases, i.e. absorption of carbon dioxide and release of oxygen.
The leaf is one of the most important organs of a plant. Leaves produce food for the plant through a process called photosynthesis. The leaves of different plants vary widely in size, shape and...
In this STEM and Beyond video we will learn all about the different parts of a leaf and what each part does.
- 4 min
- 7.3K
- Explore Planet English
- Introduction
- External Leaf Structure
- Leaf Structure Observations
- Compound Microscopy - Bright Field
- Requirements
- Procedure
- Observations
- Leaf Cross Section Under The Microscope
- Observation
- Conclusion
Like any other multicellular living thing, leaf structure is made up of layers of cells. Viewing the leaf under the microscope shows different typesof cells that serve various functions. Using a microscope, it's possible toview and identify these cells and how they are arranged (epidermal cells,spongy cells etc). To do this a compound microscope is...
To view the external leaf structure, thefollowing will be required: 1. A stereo microscope 2. A leaf (try finding a leafthat is not dry or decaying) Observation 1 (leaf surface) Procedure 1. Place a small leaf on themicroscope (stereomicroscope) 1. Start with low power andincrease gradually and record your observation ** See more info on Chloroplas...
When viewing the surface of the leaf under thestereo microscope, students will be able to clearly see hair-like structures(trichome) on the leaf surface that serve a number of functions ranging fromtrapping insects to trapping water/moisture. Students will also observe theintricate leaf veins (vascular bundles) running across the surface of the lea...
When viewing the cells of a leaf, this should be done using a compound microscope. The procedure used allows for the stomata to be seen.
A compound microscopeTweezersA needleGlass slides and cover slipsHaving obtained a leaf, carefully fold it andusing a pair of tweezers, peel off the lower surface of the leaf(epidermal membranous transparent layer) Place the peel into a watch glass that containsdistilled water Remove the epidermal skin from the watch glassand transfer to another watch glass with safranin for about 30 seconds (fewdrops of safrani...
When viewed under the microscope, it's possibleto see the epidermal cells that tend to be irregular. In addition to theepidermal cells, one will also see the leaf spores (stomata) in between theepidermal cells. Typically, the stomata are bean shaped and will appear denser(darker) under the microscope. Under high magnification, students can differen...
Whereas the transparent thin epidermal skin of the leaf allows the student to observe the stomata and other epidermal cells, it would be important to prepare a cross section of a leaf to observe the arrange of cells inside the leaf structure.
Under high magnification, students will be ableto view the internal structure of the leaf. This includes the upper and lower epidermalcells (flattened cells) with the mesophyll layer in between. Here, the mesophyllsection of the leaf contains two different type of cells including the palisademesophyll (elongated cells) and the spongy mesophyll (sph...
Using the stereo and compound microscope,students can view different parts and structures of a leaf. These include boththe external and internal structures. With a wide range of leafs available,students can obtain different types of leaves (thick and long leaves etc) andcompare the appearance of such structures as the stomata, shape and arrangement...
Mar 22, 2022 · Learn about the structure and function of the cells in leaves. Leaves are essential to life on earth. They can be tiny, like the leaves of the common water fern (Azolla filiculoides), which are just one millimetre in length. And they can be large, like the leaves of the raffia palm (Raphia regalis) that can grow to be 25 metres in length.
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Feb 17, 2023 · Layers of a Leaf. The different layers of a leaf include the cuticle layer, the upper epidermis, the palisade layer, the spongy layer, the lower epidermis, and the stomata. These structures work together to enable plants to perform their cellular processes, photosynthesis, respiration, and excretion. Leaf Anatomy.
