GENERAL BUILD OF THE HUMAN BODY 7 



to the lungs. The trachea is a tube extending from the larynx 

 to the upper part of the chest. Here it divides into two branches, 

 one of which enters each lung. The lungs (often called the lights) 



Fig. 5. General Diagrammatic View of the Circulatory System, showing 

 the arrangement of the heart and the larger blood-vessels. 



H, the heart. The arrows indicate the direction of the blood-stream. 



