Cell Structure and Function


Cell functions

  • Respiration: Cells require and absorb Oxygen to produce heat and energy.
  • Growth: Cells grow to maturity by manufacturing proteins. They may then divide or specialise. 
  • Excretion: Waste products pass out through the cell membrane.
  • Irritability: Cells can respond to a physical, chemical or thermal stimulus.

Human cell structure in detail

  • Cell membrane: An outer coating which selectively transports substances into and out of the cell. 
  • Nucleus: The control centre of the cell, regulating its general and specialist functions. 
  • Ribosomes: Made of ribonucleic


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