Define the terms given below :

1. Respiration
2. Breathing
3. Lungs
4. Inhalation
5. Exhalation

The basic structural and functional unit of the lungs is :

1. Pleura
2. Alveolus
3. Capillary
4. Diaphragm

The diagram given alongside is an experimental set up mimicking a certain process occurring in living beings. Study the figure and answer the following questions :

(i) Name the process and define it.

(ii) What are the two phases of the above mentioned process shown as (A) and (B) ?

(iii) Name the particular organs of the body shown in the figure with :
(a) Bell jar (b) Balloons (c) Rubber sheet

(iv) How do these phases (A) and (B) differ with respect to the position of ribs ?

(v) Does the breathing rate of a young boy and an old person differ ? Explain.

Write one important role of each of the following .

1. Epiglottis
2. Larynx
3. Alveolus
4. Pleura
5. Nasal chamber