Photosynthesis and respiration both are called ………………

In which period $O_{2}O\_2$ is considered to be a consuming gas?

The gas which was called “fixed air” dining the period of “Lavoisier”

Which of the following gases forms carboxy-hemoglobin?

The maximum volume of air a person can breathe in after a forced expiration is known as :

Network of tubes called Tracheae are the respiratory organs of

Which of the following membrane covers the lung?

In anaerobic respiration of yeast is added to fruit juice, the sugar gets converted to which chemical?

Which cell of the human heart receives abundant oxygen-rich blood from the lungs?

Main organs of respiratory system in human body is _____?