Chapter 34, Problem 5FIB

Summary Introduction

Introduction:

Air enters from nose or mouth and passes through nasal cavity into the pharynx. The air then travels to larynx which is guarded by epiglottis. Inhaled air travels past larynx into the trachea. The trachea splits into left and right large branches called as bronchi which lead to the left and right lung respectively. Inside the lung, each bronchus repeatedly branches into smaller tubes called bronchioles. Bronchioles conduct air to alveoli. Alveoli are the microscopic air sacs that provide a site for the exchange of gases.