Excretion in many unicellular organisms like Amoeba is done by throwing out their_______________________.

In Humans the excretory system consists __________________.

In vertebrates the main organs of excretion and maintenance of water balance are the ___________________ .

In higher multicellular organisms the excretory organs could be simple tubular structures called  _______________ in flatworms and leech.

Many unicellular organisms like_______________________ throw out their waste by diffusion from their body surface .

The organ system responsible for the removal of wastes is called _________________ .

Which of the following are correct ?

(a) The process of removal of wastes from the cells of living organisms is called excretion .

 (b) The organ system responsible for the removal of wastes is called Respiratory system .

Which of the following are correct ?

(a) The process of removal of wastes from the cells of living organisms is called excretion .

(b) The organ system responsible for the removal of wastes is called excretory system .

Which of the following are correct ?

(a) The process of removal of wastes from the cells of living organisms is called excretion .

(b) The organ system responsible for the removal of wastes is called circulatory system .

In lower animals like amoeba, excertion is mainly by _____________