Question

With regard to the respiratory system and the process of respiration in man, answer the following questions:

(d)What is meant by:
1)Residual air
2)Dead air space

Answer 1

1) Residual air - Volume of air remaining in the lungs even after a forcible expiration i.e. 1500ml

2) Dead air space- Some tidal air is left in respiratory passages such as trachea and bronchi where is no diffusion of gases can occur i.e. 150ml