What is Cell?

  • What is Cell?
  • The cells are the smallest entity that are capable of independent existence and carrying out all essential functions of life. Thus, cell forms the basic structural and functional unit of life.
  •  Robert Hooke (1635-1703) was the first to observe cell in a cork but what he saw was actually the cell walls enclosing spaces left by dead protoplasts. Anton van Leeuwenhoek was first to observe, describe and sketch a free living cell. He observed bacteria, protozoa, spermatozoa, red blood cells, etc. Robert Brown (1831) discovered the presence of nucleus in the cells of orchid root.
  • The invention of the microscope and its gradual improvisation revealed all the structural details of the cell. Leeuwenhoek is called father of microscopy. Electron microscope was invented by Max Knoll and Ernst Ruska (1931).
Posted on by
Score
Views