The process of burning of food to release energy requires _________ .

What is respiration ?

_________ are external openings to let air into the nasal cavity.

The number of times air is inhaled and exhaled in a minute is termed as _________________.

Fishes have special organs for respiration called gills.

Label the part shown here .

What is the organ used in plants for respiration ?

During which process diaphragm moves downward ?

Air tubes in insects are also called ___________.

What are the products of aerobic respiration?

What are the products of anaerobic respiration in a human cell?

Where in the body does respiration take place? Select the best answer.

Lungs are present in the

Small openings on the side of the cockroaches body is called as

Earthworms skin is

When we inhale air, it passes through our nostrils into the

During heavy exercise when supply of oxygen to our muscles is insufficient food breakdown is by

Name the term which means taking in of air rich in oxygen ....

Breathing rate in human beings in normal condition is .............

Which gas is given out during exhalation?