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SATs Revision

SATs Revision. Life Processes

Samuel
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SATs Revision

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    1. D. Crowley, 2008 SATs Revision

    2. SATs Revision Life Processes & Cells II Sunday, June 10, 2012

    3. Specialised Cells All cells are adapted to do a specific job in an organism – this is cell specialisation Sperm Cell Ovum Cell Palisade Cell Cilia Cell Root Hair Cell

    4. Sperm Cells Sperm cells – designed to fertilise eggs Tail provides movement so it can swim & find an egg to fertilise Head contains enzymes (allow it to digest through the egg membrane) Nucleus contains the genetic information which is passed on to the offspring (chromosomes)

    5. Ovum (Egg) Cells Ovum cells – designed to be fertilised An ovum is large and bulky with yolk (food store for developing organism) Nucleus contains the genetic information which is passed on to the offspring (chromosomes)

    6. Palisade Cell Palisade cells – designed for photosynthesis A palisade cell is tall with a large surface area (found on top side of leaf) absorbing both CO2 and sunlight for photosynthesis They contain lots of chloroplasts (containing chlorophyll), needed for photosynthesis

    7. Cilia Cell Cilia cells – designed to filter Cilia cells line the air passages, having tiny hairs, filtering the air trapping dust and bacteria (sweeping mucus to the back of the throat)

    8. Root Hair Cell Root hair cell – designed for absorbing Root hair cells are very long, increasing the surface area of the root (helping absorption of water and minerals) They have thin cell walls making it easier for minerals to pass across the root

    9. Cells, Tissues, Organs & Organ Systems Cells are the basic building blocks A group of similar cells come together to make a tissue A group of different tissues work together to make an organ A group of organs work together to make an organ system (or possibly a whole organism)

    10. Testbase Life Processes Cells & Cell Functions

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