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Cells Marta Soave e Aliche Cherubini 2°D
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Cells Marta Soave e Aliche Cherubini 2°D

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  • 1. ALICE CHERUBINI & MARTA SOAVE 2°DALICE CHERUBINI & MARTA SOAVE 2°D
  • 2. INDICE:INDICE: * Introduction * The Cells * Specialised Cells * Tissues * Organs * Organs Sistems * Diffusion * Osmosis * Bibliography
  • 3. There are two types of cells: eukaryotic and prokaryotic. The prokaryotic cell is simpler and smaller than a eukaryote cell, lacking a nucleus and most of the other organelles of eukaryotes. There are two kinds of prokaryotes: bacteria and archaea which share a similar structure. There are four kinds of eukaryotes: protists, fungi, plants, animals. INTRODUCTIOINTRODUCTIO NN
  • 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. Function of cells which animal and plant cells have in common Part Function Nucleus contains genetic material, which controls the activities of the cell Cytoplasm most chemical processes take place here, controlled by enzymes Cell membrane controls the movement of substances into and out of the cell Mitochondria most energy is released by respiration here Ribosomes protein synthesis happens here
  • 6. Plant cells also have extra parts: Extra parts of plant cells Part Function Cell wall strengthens the cell Chloroplasts contain chlorophyll, which absorbs light energy for photosynthesis Permanent vacuole filled with cell sap to help keep the cell turgid
  • 7. The different of animal and plant cells:
  • 8. SPECIALISED CELLSSPECIALISED CELLS Specialised animal and plant cells Type of animal cell Function Special features Red blood cells To carry oxygen Large surface area, for oxygen to pass through Contains haemoglobin, which joins with oxygen
  • 9. Nerve cells To carry nerve impulses to different parts of the body Long Connections at each end Can carry electrical signals Female reproductive cell (egg cell) To join with male cell, and then to provide food for the new cell that's been formed Large Contains lots of cytoplasm Male reproductive cell (sperm cell) To reach female cell, and join with it Long tail for swimming Head for getting into the female cell
  • 10. Type of plant cell Function Special features Root hair cell To absorb water and minerals Large surface area Leaf cell To absorb sunlight for photosynthesis Large surface area Lots of chloroplasts
  • 11. 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)
  • 12. ORGANSORGANS 1. Heart 2. Lung 3. Stomach 4. Brain 5. Leaf 6. Root
  • 13. ORGANS SISTEMSORGANS SISTEMS 1. Circulatory system 2. Respiratory system 3. Digestive system 4. Nervous system 5. Reproductive system 6. Leaf canopy
  • 14. DIFFUSIONDIFFUSION Diffusion: The movement of particles (molecules or ions) from an area of higher concentration to an area of lower
  • 15. 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
  • 16. 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
  • 17. BIBLIOGRAPHYBIBLIOGRAPHY Focus on Science http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/cells/cells1.shtml