ZOOLOGY FREE ONLINE TEST 21

The oxygen dissociation curve of haemoglobin is —

Expiratory reserve volume (ERV) is about —

The volume of air that can be forcibly inhaled after normal inspiration is —

The number of lobes in left lung is —

The number of lobes in right lung is —

The trachea divides into —

The structure that prevents food from entering trachea is —

The partial pressure of CO₂ in alveoli is approximately —

The partial pressure of oxygen in alveoli is approximately —

Expiration during normal breathing is —