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Form 1 Chapter 2- Cell as a Unit of Life

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PT3 Science Form 2, Chapter 2 Cell as a Unit of life.

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Form 1 Chapter 2- Cell as a Unit of Life

  1. 1. CHAPTER 2 CELL AS A UNIT OF LIFE
  2. 2. What is CELL? – BASIC UNITS OF LIVING THINGS Cells All Living Organisms are made out of cells Animals Plants Humans Smallest unit Function and survive on its own Growth, respiration, division and excretion Will die out eventually. All new cells are formed by cell division of other cells (mitosis). Different sizes and shapes Long, short, oval, has tail
  3. 3. USING A MICROSCOPE
  4. 4. WHO ARE THEY? • Theodor Schwann • In 1893, he asserted that plants and animals are made up of cells
  5. 5. ANIMAL CELL AND PLANT CELL
  6. 6. UNICELLULAR ORGANISM
  7. 7. MULTICELLULAR ORGANISMS Sporangium contains spores. It is light at first and it be dark and darker as it matures. The spores inside will explode to the surface and it will continue growing.
  8. 8. THE TYPES AND FUNCTION OF HUMAN CELLS
  9. 9. TYPES OF TISSUE
  10. 10. ORGANS
  11. 11. SYSTEMS
  12. 12. LEVELS OF CELL ORGANISATION
  13. 13. DO YOU KNOW? • Biggest cell in our body is MEGAKARYOCYTE ( a kind of blood cell) , which have a diameter of 0.2mm. They are found in bone narrow to prevent bleeding.
  14. 14. DO YOU KNOW? • The smallest and longest living cell in our body is the brain cell

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