The muscular sheet which divides the body cavity into thorax and abdomen is termed as :

1. Inner pleura
2. Rib cage
3. Outer pleura
4. Diaphragm

Vocal cords are found in :

1. Larynx
2. Gullet
3. Pharynx
4. Glottis

Correct the following statements by changing the first/ last word only :

1. BCG is a kind of vaccine used to prevent Pneumonia.
2. Streptomycin is a kind of vaccine.
3. Breathing is a bio-chemical process.
4. The amount of oxygen in expired air is 21%.
5. The front opening of the trachea is guarded by a muscular flap called diaphragm.

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.