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The basic unit of structure and function in nearly all plants. Although plant cells are variously modified in structure and function, they have many common features. The most distinctive feature of all plant cells is the rigid cell wall, which is absent in animal cells. The range of specialization and the character of association of plant cells is very wide. In the simplest plant forms a single cell constitutes a whole organism and carries out all the life functions. In just slightly more complex forms, cells are associated structurally, but each cell appears to carry out the fundamental life functions, although certain ones may be specialized for participation in reproductive processes. In the most advanced plants, cells are associated in functionally specialized tissues, and associated tissues make up organs such as the leaves, stem, and root.
http://www.answers.com/topic/plant-cell

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http://img.sparknotes.com/figures/9/93c5cab1f150fcaaa9f2533d0a0b45c2/plantcell.gif


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http://www.kathimitchell.com/cells.html





celltableimage
celltableimage

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ORGANELLE
LOCATION
DESCRIPTION
FUNCTION
cell wall
plant, not animal
*outer layer
*rigid, strong, stiff
*made of cellulose
*support (grow tall)
*protection
*allows H2O, O2, CO2 to pass into and out of cell
cell membrane
both plant/animal
*plant - inside cell wall
*animal - outer layer; cholesterol
*selectively permeable
*support
*protection
*controls movement of materials in/out of cell
*barrier between cell and its environment
*maintains homeostasis
nucleus
both plant/animal
*large, oval
*controls cell activities
nuclear membrane
both plant/animal
*surrounds nucleus
*selectively permeable
*Controls movement of materials in/out of nucleus
cytoplasm
both plant/animal
*clear, thick, jellylike material and organelles found inside cell membrane
*supports /protects cell organelles
endoplasmic
reticulum (E.R.)
both plant/animal
*network of tubes or membranes
*carries materials through cell
ribosome
both plant/animal
*small bodies free or attached to E.R.
*produces proteins
mitochondrion
both plant/animal
*bean-shaped with inner membranes
*breaks down sugar molecules into energy
vacuole
plant - few/large
animal - small
*fluid-filled sacs
*store food, water, waste (plants need to store large amounts of food)
lysosome
plant - uncommon
animal - common
*small, round, with a membrane
*breaks down larger food molecules into smaller molecules
*digests old cell parts
chloroplast
plant, not animal
*green, oval usually containing chlorophyll (green pigment)
*uses energy from sun to make food for the plant (photosynthesis)
http://www.usoe.k12.ut.us/curr/science/sciber00/7th/cells/sciber/orgtable.htm