Cells

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  • Cells
    • Animal Cells
      • Nucleus
        • Contains Genetic Material that controls activities of the cell.
      • Cytoplasm
        • Gel-Like substance where most chemical reactions happen. Contains enzymes that control these reactions.
      • Cell Membrane
        • Hold the cell together and controls what goes in and out.
      • Mitochondria
        • Reactions for Respiration take place.  Respiration releases energy that the cell needs to work.
      • Ribosomes
        • Where Proteins and made.
    • Plant Cells
      • Nucleus
      • Cytoplasm
      • Cell Membrane
      • Mitochondria
      • Ribomes
      • Rigid Cell Wall
        • Made of cellulose. Supports cell and strengthens it.
      • Permanent Vacuole
        • Contains Cell Sap, a weak solution of sugar and salts.
      • Chloroplasts
        • Where Photosynthes occurs, which makes food for the plant. These contain Chlorophyll.
    • Single Celled Organisms
      • Yeast
      • Bacterial Cells
        • No Nucleas
    • Diffusion (Cell Membrane)
      • Diffusion is the spreading of particles from an area of High Concentration to and area of Low Concentration
        • Small Molecules like Oxygen and Amino Acids diffuse through Cell Membranes.
    • Specialised Cells
      • Palisade Cells
        • Adapted for Photosythesis because they are packed with Chloroplasts, Tall Shape means lots of Surface Area and Thin so easy to pack together.
      • Guard Cells
        • Opens and closes the Stomata. When the pant has lots of water it swells therefore the stomata opens so gases can be exchanged for Photosythsis.
      • Red Blood Cells
        • Concave shape makes Surface Area larger. Packed with Haemoglobin.
    • Cell Organisation
      • Similar Cells are organised into Tissues (Group of Similar Cells). For Example, Glandular Tissue, secretes hormones.
        • Tissues are organised into Organs. For Example, Muscular Tissue which contracts to churn up food.
          • Orangs group up to form Organ Systems. For Example, Digestive System. The Small Intestine absorbs small soluble food molecules.

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