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17 Cards in this Set
- Front
- Back
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permanent tissue |
A tissue that lost it's ability to divide and specialised to perform a project the function is known as a permanent tissue |
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features of parenchyma |
• consists of living cells •isodiametric with a large central vacuole •nucleus is present peripherally •cell wall is thin and made of cellulose •intercellular spaces are present |
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where is parenchyma found |
•cortex and pith of plant stem • fleshy parts of fruits • leaves (mesophyls) •pith and cortex of roots • seeds (endosperm) |
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functions of parenchyma |
photosynthesis- food storage storage of water support |
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collenchyma |
Provides mechanical strength and support to the plant body |
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features of collenchyma |
• consists of living cells • possess a cytoplasm nucleus and central vacuole • generally cells are elongated and polygonal in cross section • the corners of the cell walls are thickened • intercellular spaces may or may not be present |
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locations of collenchyma |
The collenchyma forms a cylindrical tissue inner to the epidermis of herbaceous stems they are found in the veins of dicot leaves |
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features of collenchyma |
Supports photosynthesis |
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scelerenchyma |
sclerenchyma helps in providing mechanical strength and support to the plant body. two types of cells; 1 sclereids 2 sclerenchyma fibres |
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features of sclerenchyma |
consists of dead cells lignin is deposited on the cellulose cell wall cells are tightly packed, therefore no intercellular spaces cell wall is evenly thickened and forms a central lumen |
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location of sclerenchyma |
xylem, phloem coconut fibre agave fibre cotton wool endocarp of coconut, kaduru and mango pericarp of guava and pears seed coat of coffee and dates |
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functions |
supports plant body |
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sclerenchyma |
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collenchyma |
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cardiac muscle |
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epithelial cells |
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smooth muscle |
