Chapter 46, Problem 6TYK

Summary Introduction

Introduction:

The maximum volume of air that the lungs can hold at a time is called TLC or total lung capacity. TLC is the sum of VC (vital capacity) and RV (residual volume). The VC is the volume of air breathed out after the deepest inspiration and is the sum of IRV (inspiratory reserve volume), TV (tidal volume), and ERV (expiratory reserve volume). Here, IRV is the maximum volume of air that can be inspired; TV is the tidal volume of air that moves into and out of the lungs during quiet breathing; ERV is the maximum volume of air that can be expired from the lungs; and RV is the volume of air that remains in the lungs after maximum exhalation. The changes in lung volumes are significant during sports and other physical activities. Speed skating is a competitive sport of ice skating, in which skaters race each other.