Form 1 Chapter 2- Cell as a Unit of Life
Transcript of Form 1 Chapter 2- Cell as a Unit of Life
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CHAPTER 2CELL AS A UNIT OF LIFE
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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
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USING A MICROSCOPE
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WHO ARE THEY?
• Theodor Schwann
• In 1893, he asserted that plants and animals are made up of cells
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ANIMAL CELL AND PLANT CELL
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UNICELLULAR ORGANISM
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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.
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THE TYPES AND FUNCTION OF HUMAN CELLS
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TYPES OF TISSUE
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ORGANS
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SYSTEMS
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LEVELS OF CELL ORGANISATION
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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.
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DO YOU KNOW?
• The smallest and longest living cell in our body is the brain cell