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All about cells

Discover the fascinating world of cells - the smallest units of living matter that make up plants and animals. Learn about their structures, functions, and the differences between plant and animal cells.

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All about cells

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  1. All about cells 27th Sept 2007

  2. CELLS Plants and Animals are built up of Cells stuck together. Houses are built up of bricks stuck together.

  3. How many cells? • Unicellular Eg. • Multicellular

  4. What is a cell? • All living organisms are composed of cells. • But what exactly is a cell?

  5. CELLS ARE: • the smallest unit of living matter. • Cells are small compartments that hold all of the biological equipment necessary to keep an organism alive.

  6. This means that each cell can: • it can take in nutrients, convert these nutrients into energy, • carry out specialised functions and • reproduce as necessary.

  7. The two Cell types

  8. Activity 1: Learning to draw a plant cell: You will need: • 1 well sharpened pencil • Eraser

  9. Types of cells

  10. Reading Assignment 1 • Find and underline on your handout the functions of the following structures: • Cell wall • Cell membrane • Vacuoles • Chloroplasts • Mitochondrion

  11. Cell Structures and Functions: • Nucleus Controls reproduction and also contains the characteristics of the cell. • Cell membrane Surrounds the cell and controls what moves in and out of the cell • Cytoplasm - Jelly like substance where chemical reactions take place and other parts are embedded.

  12. Mitochondria Found only in plant cells where respiration occurs. • Chloroplasts These makes plants green. They contain chlorophyll which is needed for photosynthesis. • Cell wall Gives the cell its shape. The cell's "skeleton". • Vacuoles Where the cell sap is stored.

  13. The differences between animal and plant cells are as follows:

  14. Review Question

  15. Home -Work • Find out the reasons for the difference s which exists between the plant and animal cells.

  16. The END Apple 2007

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