Complete the following paragraph by filling in the blanks (i) to (x) with appropriate words:
The air breathed in and out in course of quiet breathing is termed as (i) .............. Some tidal air is left in (ii) .................. such as trachea and bronchi where no (iii) .............. of gases can occur. (iv) ............... is the air that can be drawn forcibly and (v).. ....... is the air forcibly expelled. The volume of air that can be taken (vi) ........... and (vii) ................. by maximum inspiration and expiration is called (viii) .............. . Some (ix) ..... air is always left in the (x)............. even after forcibly breathing out.

Explanation

Here is the step-by-step solution to the question:

1. **Identify the term for air breathed in and out during quiet breathing**: The air breathed in and out in the course of quiet breathing is termed as **(i) tidal volume**. Tidal volume refers to the amount of air that is inhaled or exhaled during normal breathing, which is approximately 500 ml in a normal adult.

2. **Identify where some tidal air is left**: Some tidal air is left in **(ii) respiratory passages** such as the trachea and bronchi. These passages do not participate in gas exchange.

3. **Identify the process that does not occur in these passages**: In these respiratory passages, no **(iii) diffusion** of gases can occur. Diffusion is the process by which gases exchange in the alveoli of the lungs.

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