Cells

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Cells

  1. 1. ALICE CHERUBINI & MARTA SOAVE 2°DALICE CHERUBINI & MARTA SOAVE 2°D
  2. 2. INDICE:INDICE: * Introduction * The Cells * Specialised Cells * Tissues * Organs * Organs Sistems * Diffusion * Osmosis * Bibliography
  3. 3. There are two types of cells: INTRODUCTIOINTRODUCTIO NN prokaryoticeukaryotic 1. Bacteria 2. archaea 1. protists, 2. fungi, 3. plants, 4. animals
  4. 4. THE CELLSTHE CELLS 1. All organisms are made of cells 2. Unicellular 3. Multi-cellular 4. Animal cells and plant cells 5. Diffusion
  5. 5. nucleus cytoplasm Cell membrane mitochondria ribosomes Function of cells which animal and plant cells have in common
  6. 6. Plant cells also have extra parts: cell wall, chloroplasts, permanent vacuole
  7. 7. The different of animal and plant cells:
  8. 8. SPECIALISED CELLSSPECIALISED CELLS Specialised animal cells Red blood cells Nerve cells Female reproductive cell (egg cell) Male reproductive cell (sperm cell)
  9. 9. Specialised animal cells Root hair cell Leaf cell SPECIALISED CELLSSPECIALISED CELLS
  10. 10. TISSUESTISSUES 1. Muscle 2. The lining of the intestine 3. The lining of the lungs 4. Phloem (tubes that carry dissolved sugar around a plant) 5. Root hair tissue (for plants to take up water and minerals from the soil)
  11. 11. ORGANSORGANS 1. Heart 2. Lung 3. Stomach 4. Brain 5. Leaf 6. Root
  12. 12. ORGANS SISTEMSORGANS SISTEMS 1. Circulatory system 2. Respiratory system 3. Digestive system 4. Nervous system 5. Reproductive system 6. Leaf canopy
  13. 13. DIFFUSIONDIFFUSION Diffusion: The movement of particles (molecules or ions) from an area of higher concentration to an area of lower
  14. 14. Examples of diffusion down concentration gradients Location Particles move From To Gut Digested food products Gut cavity Blood in capillary of villus Lungs Oxygen Alveolar air space Blood circulating around the lungs
  15. 15. OSMOSISOSMOSIS Water can move across cell membranes because of osmosis. For osmosis to happen you need: • two solutions with different concentrations • a partially permeable membrane to separate them
  16. 16. BIBLIOGRAPHYBIBLIOGRAPHY Focus on Science http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/cells/cells1.shtml

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