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18 Cards in this Set
- Front
- Back
SCLERENCHYMA |
has both a primary wall and a thick secondary wall that is almost always lignified |
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PARENCHYMA |
Thin primary walls. Typically alive at maturity. Has many functions |
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COLLENCHYMA |
Unevenly thickened primary walls. Typically alive at maturity. PROVIDES PLASTIC SUPPORT |
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Sclerenchyma |
Plant tissue that is typically dead at maturity |
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Chlorenchyma Glandular Cells Transfer Cells |
Types of parenchyma cells |
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Chlorenchyma |
parenchyma cells involved in photosynthesis |
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Glandular cells |
parenchyma cells that secrete nectar, fragrances, mucilage, resins, and oils ; they typically contain few chloroplasts but have elevated amounts of dictyosomes and endoplasmic reticulum. |
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Transfer Cells |
parenchyma cells that mediate short distance transport of material by means of a large, extensive plasma membrane capable of holding numerous molecular pumps. |
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COLLENCHYMA |
This plant tissue is present in elongating shoot tips that must be long and flexible, such as those of vining plants like grapes. |
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Collenchyma |
Type of plant tissue that is usually produced only in shoot tips and young petioles, where the need for extra strength justifies the metabolic cost |
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Sclerenchyma cells |
___________ develop from parenchyma cells in mature organs after they have stopped growing and have achieved their proper size and shape. |
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Mechanical sclerenchyma Conducting sclerenchyma |
Two types of sclerenchyma |
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Sclerids Fibers |
Types of mechanical sclerenchyma |
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Tracheids Vessel Elements |
Types of conducting sclerenchyma |
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Sclerids |
Type of mechanical sclerenchyma that is more or less isodiametric. It is often dead at maturity. |
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Fibers |
Type of mechanical sclerenchyma that are long, usually dead, but alive parts are usually involved in storage |
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Tracheids |
Type of conducting sclerenchyma that is long and narrow with tapered ends, with no poriferations. Dead in maturity and found in vascular plants |
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Vessel Elements |
Type of conducting sclerenchyma that are short and wide and with rather perpendicular and walls. Dead at maturity and is found among flowering plants exclusively (w/ the exception of ferns, horsetail, gymnosperms) |