Respiration in ...

Respiratory organs present in insects are ________.

Breathing is a process that
i) Provides $$O_2$$ to the body.
ii) Breaks down food to release energy.
iii) Helps the body to get rid of $$CO_2$$.
iv) Produces water in the cells.
Which of the following gives the correct combination of functions of breathing? 

Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to 

In humans fine particles, penetrate deep into ________.

Which of the following is correct about respiration in plants? 

In which of the following cellular respiration takes place?

Human breathe out air which is rich in ______.

The percentage of oxygen and carbondioxide in inhaled air is?

Tiny air sacs where gas exchange occurs in the lungs are called _________. 

Which of the following is incorrect about gills?