Which of the following is the correct sequence of air passage during inhalation?

Internal respiration may be defined as:

When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of :

Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to conversion of pyruvate to:

During the deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in :