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Cells

Cells. W Richards Worthing High School. Please note – some of the animation effects used here only work in PP XP. Using a microscope. 1. Eyepiece. 2. Arm. 7. Lenses. 6. Stage. 3. Focus adjustor. 5. Mirror. 4. Base. Plant cells vs. Animal cells. 4). 1). 2). 5). 3). 6).

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Cells

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  1. Cells W Richards Worthing High School Please note – some of the animation effects used here only work in PP XP

  2. Using a microscope 1. Eyepiece 2. Arm 7. Lenses 6. Stage 3. Focus adjustor 5. Mirror 4. Base

  3. Plant cells vs. Animal cells 4) 1) 2) 5) 3) 6) Only plant cells have these: Both types of cell have these: Cell wall – provides support Cytoplasm - this is where the reactions happen Nucleus – The “brain” of the cell Chloroplasts – contain chlorophyll Cell Membrane – holds the cell together Large Vacuole – contains sap

  4. Specialised cells Strong tail for swimming Vacuole containing enzymes Consider the root hair cell: • It is “suited” to its job of taking in water and nutrients in 2 ways: • It has a large surface area • It has a thin cell membrane The sperm cell is another example of a specialised cell:

  5. More specialised animal cells I.D: Function: Features: Ciliated epithelial cell White blood cell Nerve cell (neurone) Egg cell (ovum) Red Blood Cell Carries oxygen around the body No nucleus and large surface area

  6. Cells, tissues, organs and systems Basically, all living things are made up of cells… A group of CELLS makes up a TISSUE A group of TISSUES makes up an ORGAN A group of ORGANS makes up a SYSTEM A group of SYSTEMS make up an ORGANISM

  7. Another example Muscle cells Muscle tissue Organ System Organism Here’s another example in humans:

  8. Cell growth Animal cells: Plant cells:

  9. Plant reproduction For a plant to reproduce two stages must happen: Stage 1: Pollination – pollen from one plant is taken to another by insects or the wind:

  10. Plant reproduction Ovaries Stage 2: Fertilisation – a pollen tube grows down through the style and the pollen grain (which contains the male sex cell) travels down the tube to fertilise the female egg cell:

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