Explanation The decrease in respiratory muscle strength with the age leads progressive decline in lung function. The two main reason for this declined lung capacity are as follows: 1. Aging is associated with the muscle and bone changes. The diaphragm of older people becomes weaker, thus decreasing the ability to inhale and exhale. Ribcage bones also becomes thinner and alteration in their shape may lead to lesser expansion and contraction during breathing...

5th Edition

ISBN: 9780321861580

Author: Marieb, Elaine N.

Publisher: Pearson College Div

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Question

Chapter 21, Problem 24CYU

Summary Introduction

To review:

The two reasons for the decline in vital capacity with the increasing age.

Introduction:

The vital capacity is defined as the maximum amount of the air expelled by a person after a maximum inhalation. It is the sum of the of inspiratory reserve volume, tidal volume, and expiratory reserve volume. The vital capacity is maximum at the age of 20-25 years, when the lungs and respiratory muscle strength is well developed. After this, aging is associated with the functioning of the lungs and vital capacity decline with the age.

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Chapter 21, Problem 23CYU

Chapter 21, Problem 1RQ

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Chapter 21 Solutions

Anatomy & Physiology

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Solution Summary: The author explains the two main reasons for the decline in vital capacity with the increasing age.

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