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Cards In This Set
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Definition of tissue
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 A group of cells that look the same and have the same function |
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The 4 groups of plant tissues
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 1) Meristematic - growth tissue2) Epidermal3) Ground - Parenchyma, Sclerenchyma, Collenchyma and Chlorenchyma4) Conducting (vascular) - xylem and phloem |
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The location and function of Meristematic tissue
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 It is found in the apical bud, auxiliary bud, root tip and cambium regions it function is that it is a growth tissue so it undergoes mitosis in order to give rise to new plant cells that allow the plant to grow in length and width and give rise to the different organs |
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The location and function of Epidermal tissue
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 It is found in the outer layer covering the entire plant Its function is that it is used for protection to the underlying tissues against infection, injury and waterloss |
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What are the three modifications of epidermal cells
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Stomata , Root hairs and Trichomes
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What are the functions and locations of the three modifications of epidermal cells
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Stomata- found in the aerial parts of the plant and not in the root region and its function is that it allows for gaseous exchange Root hairs - they are found in the root and their function is that they increase surface area to absorb water and minerals Trichomes - they are found in leaves and young stems and their function is that they reflect light, protection and they retain moisture
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What is the location and function of Parenchyma
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 It forms the bulk of the plant and its function is that it ; stores food and water, offers support when turgid and the translocation movement of substances around the plant and gaseous exchange |
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What is the function and location of Collenchyma
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 It is found under the dicot stem and it offers support to the stem around the perimeter |
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What is the location of sclerenchyma
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 It forms a cap ontop of the vascular bundle , around the veins in leaves and amongst vascular tissue |
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What are the two types of schlerenchyma
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Sclerenchyma fibres and sclereids ( stone cells)
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Give some characteristics of fibres
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 -they are elongated with tapered ends- they have a thick cell wall- they have lumen |
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Give some characteristics of sclereids ( stone cells )
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 - found in certain fruits eg. pears and the shells of nuts- has a circular and irregular shape- has a thick cell wall- has lumen |
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What is the location of xylem
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 Xylem is found in the stele ( centre) of the root; vascular bundles in the stem and the veins in leaves |
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What four tissues is xylem made up of
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-sclerenchyma fibres- parenchyma- vessels- tracheids
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What are the characteristics of vessels
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 Vessels have lumen, a thick cell wall and broken down cross walls. Walls can be thickened in four different ways ; spiral, annular, reticulate and pitted |
