Plant And Animal Cells Essay

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|Plant and Animal Cells | Maria Ahmed | Plant and animal cells All cells have these features in common: • a cell membrane which controls what passes into and out of the cell • cytoplasm where chemical processes (controlled by enzymes) take place, and • a nucleus containing genetic material which controls the cell's behavior. In addition, plant cells have the following unique features: • a rigid cell wall made of cellulose • vacuoles containing cell sap, and • Chloroplasts, containing chlorophyll which enables photosynthesis to take place. Make sure you can draw and label a generalized animal and a generalized plant cell, like this: Although it is useful to think about the general features of plant and animal cells, all cells in living organisms display specialized features that make them suited to carrying out their very specific jobs - for example, root cells, stem cells and leaf cells within a plant. A complex organism can be compared to a factory production line with different people performing different tasks. Cells within an organism display a similar division of labour to make the whole organism work properly and at a high level of efficiency. Specific functions of animal cells | | generalized plant cell Nerve cell (motor neuron) Pass sensory impulses from receptor to an effecter Dendrites to make connections with other neurones. Long axon or nerve fiber to carry the impulse to the target organ. End plate forms a synapse with an effecter (a muscle or a gland). Epithelial cell Lining cells, e.g. inside the cheeks Flattened shape. Interlocking edges, cells fitting closely together to form a continuous lining. Ciliated epithelium Lining the nose and wind pipe Flattened shape.
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