A part of respiration

As tadpoles, frogs breathe through

 The air we breathe in, is not the same as the air we breathe out and the process is called

 Respiration in plants takes place through

We breathe air into our______________and the  chest expands.

Insects breathe through holes in their body called________.

Respiration is a _______ process.

Most living organisms require oxygen for respiration, such respiration is called

  ____________is a cellular respiration that occurs without oxygen.

The process which breaks down food to release energy with the help of oxygen and respiratory enzymes is called: