who discovered cell?
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ROBERT HOOK WAS DISCOVERED THE CELL
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Cell is the structural and functional unit of living organisms.
• All living organisms are made up of cell. That's why cell is known as structural unit of life.
• A single cell can perform all life functions with the help of it's components. Therefore it is known as functional unit of life.
→ Robert Hooke first discovered the cell}Robert Hooke first discovered the cell in 1665.
• He prepared a thin slice of cork and observed it under self made microscope. He saw some box like structures which he named as cell.
→ Anton Von Leeuwenhoek first saw the living cell and also first describe the living cell.
→ Each cell has a plasma membrane, cytoplasm and nucleus.
→ Human body is composed of trillions of cells.
→ Cell theory states that
• All living organisms are made up of cells.
• All cells come from pre-existing cells through cell division.
→ It contain hereditary information due to presence of nucleus or nucleoid.
→ All organisms are made up of cells. Organisms with single cells are known as unicellular organisms. And organisms with multiple cells are known as multicellular organisms.
→ Cells size ranges from 1 - 100 μm.
→ Mycoplasmas, is the shortest cell (0.3 μm) and ostrich egg and nerve cells are the largest cell.
→ Cells are in different shapes. Their shape vary with their function. They may be cuboid, thread like, disc like etc.
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