Distinguish, differentiate, compare and explain what is the main difference between Vital capacity and Total lung capacity.
Difference between Vital capacity and Total lung capacity
1. Vital capacity is the amount of air which one can inhale and exhale with maximum effort. Total lung capacity is the total amount of air present in the lungs and the respiratory passage after a maximum inspiration.
2. Vital capacity is the sum of tidal volume, inspiratory reserve volume and expiratory reserve volume (VC = TV + IRV + ERV). It varies from 4 — 4.6 liters in a normal adult person. Total lung capacity is the sum of the vital capacity and the residual volume (TLC = VC + RV). It is 5100 to 5800 mL.