Name the respiratory organs of flatworm, earthworm, fish, prawn, cockroach and cat.

Name the enzyme that catalyses the bicarbonate formation in RBCs.

Air moving from the nose to the trachea passes through a number of structures. List in order of the structures.

Which structure seals the larynx when we swallow?

Resistance in the airways is typically low. Why? Give two reasons.

Write about dead space.

What is Residual Volume?

What is meant by 'SURFACTANT'?

What is breathing? What are the steps involved.

How are lungs protected?

What is pleura? What is its function?

What is dead space?

How does gaseous exchange take place in the alveoli?

How is respiration regulated?

What are the effects of smoking?