A system through which food, oxygen, hormones are carried to their target organs and also waste metabollic materials are removed is termed transport or circulatory system.

        Importance of Transport Systen

 *Regulation of body temperature through distribution and transportation of heat.

 *Regulation of water balance in the body.

 *Through transport systems, hormones in animals and auxins in plants are carried to their target tissues.

 *Transports excess useful substances to specialised tissues that can store them.

     This is the transfer of matured pollen grains from the anther to the stigma of a flower of the same kind.

     Agents of pollination; 

  *Animal(insects, birds, man, bat).

  *Wind.

  *Water.

  *The growth of stigma towards the anther to make contact.

       Types of pollination 

  *Self pollination--This is the transfer of pollen grains from the anther of a flower to the stigma of another flower on the same plant.

   *Cross pollination--This is the transfer of pollen grains from the anther to the stigma of another plant but of the same species.