Describe in brief the function of ribs and diaphragm in breathing.

Define the terms given below :

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

Fill in the blanks with suitable words :

1. The …………… emerges from the larynx down below in the neck.
2. The inner lining of trachea consists of …………… epithelium.
3. …………… end up into microscopic alveoli.
4. The volume of chest cavity …………… during inspiration.
5. The amount of …………… gas remains the same in the inspired air and expired air.

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 ?