1. Introduction
  1.1 Background
  1.2 Significance of the Study
  1.3 Objectives

2. Anatomy and Physiology of the Respiratory System
  2.1 Overview of the Respiratory System
  2.2 Structure and Function of the Respiratory System
  2.3 Gas Exchange in the Lungs

3. Age-Related Structural Changes in the Respiratory System
  3.1 Changes in the Chest Wall
  3.2 Alterations in Lung Tissue
  3.3 Modifications in Airway Structure

4. Age-Related Functional Changes in the Respiratory System
  4.1 Decline in Lung Function
  4.2 Changes in Respiratory Muscle Strength
  4.3 Impaired Cough Reflex and Mucus Clearance

5. Impact of Aging on Respiratory Health
  5.1 Increased Susceptibility to Respiratory Infections
  5.2 Development of Chronic Respiratory Diseases
  5.3 Effects on Exercise Capacity and Physical Activity