Which of the following is not a part of the respiratory system ?

1. Nostrils
2. Lungs
3. Mouth
4. Trachea

The energy produced during cellular respiration is .

1. ADP
2. ADH
3. ATP
4. None of the above

The diagram given alongside shows the "Human Respiratory System". Study the same and answer the following questions :

(i) Label the guidelines 1 to 4.

(ii) Define the structure shown as part 2.

(iii) Name the basic structural and functional unit of part 3.

(iv) Write one specific structural feature of the inner lining of part 1.

(v) What is the muscular sheet on which part 3 rests ?

Write one important role of each of the following .

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