7th Class Science Movement of Substance Movement of Substance

Movement of Substance

Category : 7th Class

*     Movement of Substance


The two basic requirement of each and every cell are:

  • Availability of life substances (glucose and oxygen)
  • Removal of waste products


Multicellular life may be made up of trillions of cells. All cells are not in direct contact with air so that they can get air directly and can make food for themselves. Therefore, a transport system is required for supplying all the cells with glucose and oxygen and for removing waste products out of the body. Transportation is one of the most important metabolic functions of the body, without which multicellular life is not possible..

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