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cells in organisms n.
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Cells in organisms

Cells in organisms

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Cells in organisms

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  1. Cells in organisms Cells are the building blocks of all living things

  2. Euglena have only one cell. They live in water and make their own food from sunlight.

  3. Multicellular organisms. • Humans contain many different cells for various functions. • Red blood cells carry oxygen • Muscle cells move bones and organs • Nerve cells conduct messages • Stomach lining cells make digestive juices • Cells are studied with a microscope

  4. Setup • Adjust the mirror to maximise the light • Rotate the lowest power lens (the shortest) above the hole in the stage • Place object (eg slide) above hole • Turn focussing knob till lens just above hole (view this from the side) • View through eyepiece and wind objective lens away from stage till focussed.

  5. Wet slide • Letter e should be reversed